foo vs ft, What's the Difference?

Which to use

“foo” and “ft” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#43,447
“foo” frequency rank: #17,714
“ft” frequency rank: 61161
confusion score

Side-by-Side Comparison

Feature	foo	ft
Definition	Variable métasyntaxique en programmation informatique.	feuillet.

Where the eye mixes foo and ft

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch

foo

2 ch

Why the eye confuses foo with ft

A purely visual mix-up. foo (\fu\) and ft (\fœ.jɛ\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 61161, derived from the frequency rank of both members and their visual similarity.

foo is recorded at frequency rank #43,447, classified as anoun, pronounced \fu\. ft is at rank #17,714, tagged as anoun, pronounced \fœ.jɛ\.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 61161, this pair ranks #93,775 of 440,172 scored French confusable pairs - among the most confusable pairs.

Orthographic DNA of foo vs ft

Shared letters: f. Private to "foo": o. Private to "ft": t.

"foo" · 3 letters · shape CVV · "ft" · 2 letters · shape CC

Frequently Asked Questions

Is swapping "foo" for "ft" ever safe?

No. They are said differently (\fu\ versus \fœ.jɛ\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

In ordinary French text, does "foo" or "ft" show up more?

"ft" is the more common of the two: it sits at frequency rank #17,714 in our French list, against #43,447 for "foo". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

Full dictionary entry for "foo" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "ft" - compare definitions side by side with the headword page. Word entry
This pair ranks #93,775 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"foo" and "ft" also get mixed up with nearby pairs, the highest-scored neighbour is "Fee vs foo". Nearby pair

Confusion rank #93,775 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.