Forth and fourth are two English words that sound exactly alike but have completely different meanings. Because they are homophones, English learners often confuse them in writing, especially when typing quickly or listening to someone speak.
The good news is that the difference is simple once you understand what each word does in a sentence. Forth usually relates to moving forward or onward, while fourth refers to the number four in a sequence.
Knowing the difference can help you avoid common spelling mistakes in emails, essays, messages, and everyday English. In this guide, you will learn exactly when to use forth and fourth.
Why “Forth” and “Fourth” Are Confusing
The main reason forth and fourth are confusing is that they have the same pronunciation in standard English. When you hear either word spoken aloud, you normally cannot tell which spelling the speaker means.
Similar pronunciation
Both words are pronounced approximately like “forth.” The u in fourth is not pronounced as a separate sound.
For example:
- “Move forth” and “move fourth” may sound similar.
- However, their meanings are different because their spellings and grammatical functions are different.
Similar spelling
The words are also visually similar:
- forth
- fourth
Both begin with four/four-like sounds, which makes spelling errors especially common.
Context confusion
Context usually tells you which word is correct.
If you are talking about moving forward, use forth:
The soldiers marched forth.
If you are talking about position number four, use fourth:
She finished fourth in the race.
Common learner mistakes
English learners often write fourth when they mean forth, or forth when they mean fourth. These errors are especially common in phrases such as:
- go forth
- come forth
- set forth
- fourth place
- fourth grade
- the fourth day
The easiest solution is to focus on the meaning rather than the sound.
Forth vs Fourth Explained Simply
Forth means forward, onward, or away from a starting point, while fourth means number four in a sequence.
One-line distinction
Forth = forward/onward. Fourth = number 4 in order.
Examples
Forth:
The explorers went forth into the unknown.
Here, forth means forward or onward.
Fourth:
Ahmed came fourth in the competition.
Here, fourth means number four in the ranking.
A useful shortcut is:
If you can replace the word with “forward” or “onward,” use forth. If you can replace it with “number four,” use fourth.
Understanding Homophones in English
What Are Homophones?
Homophones are words that sound the same but have different meanings, spellings, or both.
For example:
- right and write
- see and sea
- there, their, and they’re
- forth and fourth
Although these words sound alike, they cannot always be used interchangeably.
Why Homophones Cause Confusion
Homophones are difficult because pronunciation does not always reveal spelling.
For example:
She came fourth.
When you hear this sentence, you know the speaker means position number four only because of the context. The sound itself does not tell you whether the spelling is forth or fourth.
That is why learners should connect each word with its meaning and grammatical role, not just its pronunciation.
What Does “Forth” Mean?
Definition and Core Meaning
Forth is an adverb that generally means forward, onward, or out from a particular place.
It is often used with verbs that describe movement, communication, or bringing something into view.
For example:
The travelers moved forth toward the mountains.
Here, forth means forward.
Another common use appears in the phrase:
Go forth and do your best.
In this expression, forth means forward or onward.
Origin and Historical Use
The word forth is an old English word that has been used for centuries. It comes from Old English forms related to the idea of moving forward or onward.
Its historical use can be seen in older religious, literary, and formal writing. Today, it is still perfectly correct, although some expressions containing forth sound more formal or literary than ordinary conversation.
Modern Usage and Synonyms
In modern English, forth commonly appears in phrases such as:
- go forth
- come forth
- move forth
- set forth
- bring forth
- put forth
- and so forth
Depending on the context, possible synonyms include:
- forward
- onward
- ahead
- outward
- ahead of
- onward from
Common Uses of “Forth”
1. Go forth
Means to go forward or leave to begin something.
The students went forth to begin their journey.
2. Come forth
Means to come forward or appear.
The witness was asked to come forth.
3. Set forth
Can mean to begin a journey or explain something clearly.
They set forth early in the morning.
4. And so forth
Means “and so on.”
We discussed food, travel, music, and so forth.
Example Sentences
- The army marched forth at dawn.
- She stepped forth to accept the award.
- The leader encouraged everyone to go forth with confidence.
- The document sets forth several important rules.
- He continued to move forth despite the difficulties.
What Does “Fourth” Mean?
Definition and Core Meaning
Fourth is an ordinal number. It means coming after third and before fifth, or number four in a sequence.
For example:
This is my fourth attempt.
The speaker has already made three attempts, so this one is number four.
Origin and Historical Context
Fourth comes from four, the basic cardinal number. The word developed to describe the fourth position or place in an ordered sequence.
Like other ordinal numbers, it tells us where something comes in an order:
- first
- second
- third
- fourth
- fifth
Modern Usage and Synonyms
Fourth is extremely common in everyday English. It can describe:
- position
- rank
- order
- dates
- floors
- stages
- attempts
- events
There is not always a direct synonym for fourth, but phrases such as number four or fourth in order can sometimes express the same idea.
Common Uses of “Fourth”
1. Fourth place
Our team finished fourth.
2. Fourth day
We left on the fourth day of the trip.
3. Fourth floor
Her office is on the fourth floor.
4. Fourth time
This is the fourth time I have visited this city.
5. Fourth of July
Many Americans celebrate the Fourth of July.
Example Sentences
- She won fourth place in the competition.
- Today is the fourth day of the course.
- My apartment is on the fourth floor.
- He was the fourth person to arrive.
- This is the fourth chapter of the book.
Forth vs Fourth: Key Differences at a Glance
| Word | Part of Speech | Meaning | Example Context |
|---|---|---|---|
| Forth | Adverb | Forward, onward, or outward | They marched forth. |
| Fourth | Ordinal adjective/noun | Number four in a sequence | She finished fourth. |
The biggest difference is grammatical as well as semantic. Forth generally describes movement or continuation, while fourth identifies a position or order.
Compare:
The soldiers moved forth.
This means they moved forward.
The soldiers finished fourth.
This means they finished in position number four.
How to Remember the Difference Between Forth and Fourth
Learning a simple memory trick can make this pair much easier.
Memory Trick 1: Think “Forward”
Forth contains no u.
Think:
Forth = Forward
Both ideas begin with the concept of moving ahead.
If the sentence is about movement or going onward, forth may be the correct choice.
Memory Trick 2: Think “Four”
Fourth contains the word four:
FOUR + TH = FOURTH
Because fourth comes from four, it refers to position number four.
Think:
Fourth = Four in order
Memory Trick 3: Ask a Question
Before writing the word, ask:
Does it mean “forward/onward”?
If yes → forth
Does it mean “number four”?
If yes → fourth
One Memorable Example
Remember this sentence:
The fourth runner moved forth toward the finish line.
Here:
- fourth = number four in the race
- forth = forward
The two words appear together, making their difference easier to remember.
Common Mistakes and Confusions
Mistake 1
✘ She came forth in the competition.
If you mean she finished in position number four, this is incorrect.
✔ She came fourth in the competition.
Why?
Her position is number four, so use fourth.
Mistake 2
✘ The explorers moved fourth into the forest.
If you mean they moved forward, this is incorrect.
✔ The explorers moved forth into the forest.
Why?
The word describes forward movement, so forth is appropriate.
Mistake 3
✘ Go fourth and do your best.
✔ Go forth and do your best.
Why?
The expression means to move forward or continue, not to go to position number four.
Mistake 4
✘ This is my forth attempt.
✔ This is my fourth attempt.
Why?
The attempt is number four, so the correct word is fourth.
Examples Section: Correct and Incorrect Usage
Example 1
✔ Correct: The soldiers marched forth.
✘ Incorrect: The soldiers marched fourth.
Explanation: They marched forward, so forth is correct.
Example 2
✔ Correct: She finished fourth in the race.
✘ Incorrect: She finished forth in the race.
Explanation: Her position was number four, so use fourth.
Example 3
✔ Correct: The speaker stepped forth to answer the question.
✘ Incorrect: The speaker stepped fourth to answer the question.
Explanation: The speaker moved forward, so forth is correct.
Example 4
✔ Correct: This is the fourth chapter.
✘ Incorrect: This is the forth chapter.
Explanation: The chapter is number four in the sequence, so fourth is correct.
Example 5
✔ Correct: We went forth with our plans.
✘ Incorrect: We went fourth with our plans.
Explanation: Went forth means continued or moved forward.
Example 6
✔ Correct: He lives on the fourth floor.
✘ Incorrect: He lives on the forth floor.
Explanation: The floor is number four.
Self Assessment: Test Your Knowledge
Fill in each blank with forth or fourth.
- The hikers moved ______ toward the mountain.
- Maria came ______ in the spelling competition.
- This is the ______ time I have watched this movie.
- The teacher encouraged the students to go ______ and try again.
Self Assessment Answers
- forth — The hikers moved forth means they moved forward.
- fourth — Maria came fourth, meaning she finished in position number four.
- fourth — The movie has been watched four times, making this the fourth time.
- forth — “Go forth” means to move forward or continue.
FAQs About “Forth and Fourth”
Is “forth” the same as “fourth”?
No. Forth usually means forward or onward, while fourth means number four in a sequence.
Is “forth” a number?
No. Forth is generally an adverb related to movement or continuation. Fourth is the ordinal form associated with the number four.
What is the difference between forth and fourth?
The simple difference is meaning. Forth means forward or onward; fourth refers to position number four.
Is “fourth” an ordinal number?
Yes. Fourth is an ordinal number because it shows position in an order, such as first, second, third, fourth, and fifth.
What does “go forth” mean?
Go forth means to move forward, proceed, or go onward. It is often used in formal, inspirational, or literary language.
How do you remember forth vs fourth?
Remember forth = forward and fourth = four. If you mean moving onward, use forth. If you mean number four in a sequence, use fourth.
Are forth and fourth homophones?
Yes. Forth and fourth are homophones because they normally have the same pronunciation but different spellings and meanings.
Conclusion:
Understanding forth vs fourth becomes easy when you focus on meaning instead of pronunciation. Forth generally means forward, onward, or outward, and it commonly appears in expressions such as “go forth,” “come forth,” “set forth,” and “and so forth.” On the other hand, fourth is an ordinal number that means number four in a sequence. You will see it in phrases such as “fourth place,” “fourth floor,” “fourth attempt,” and “fourth chapter.”
The best memory trick is simple: connect forth with forward, because both describe moving ahead. For fourth, look at the word four inside it. If you are talking about movement or continuation, choose forth. If you are talking about position number four, choose fourth.
Because these words sound alike, mistakes are understandable, even for experienced English learners. However, once you train yourself to check the meaning and context, the correct spelling becomes much easier to choose. Keep practicing with real sentences, and soon you will naturally know whether forth or fourth belongs in your writing. Every small distinction you master brings you one step closer to clearer, more confident English.
David Parker is a language researcher and content writer at WordClarity.com, specializing in English word meanings, comparisons, spelling differences, and usage guides. He creates easy-to-understand content that helps readers improve clarity and confidence in everyday English. His work focuses on making language learning simple, accurate, and practical.