apu vs au, What's the Difference?

Which to use

“apu” is a noun and “au” is an article - they look or sound alike but fill different roles in a sentence.

#48,918
“apu” frequency rank: #24
“au” frequency rank: 48942
confusion score

Side-by-Side Comparison

Feature	apu	au
Definition	Banquise.	Contraction de la préposition à et de l'article défini le.

Where the eye mixes apu and au

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

3 ch

apu

2 ch

Look-alike desk: apu vs au

These two trip readers on the page rather than in the ear: apu is \a.pu\ while au is \o\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (noun vs article), which is usually the fastest check. Our composite confusion score for this pair is 48942, derived from the frequency rank of both members and their visual similarity.

apu is recorded at frequency rank #48,918, classified as anoun, pronounced \a.pu\. au is at rank #24, tagged as anarticle, pronounced \o\.

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 48942, this pair ranks #174,814 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of apu vs au

Shared letters: au. Private to "apu": p. Private to "au": -.

"apu" · 3 letters · shape VCV · "au" · 2 letters · shape VV

Frequently Asked Questions

Is swapping "apu" for "au" ever safe?

No - they are not even the same part of speech. "apu" is a noun and "au" an article, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "apu" or "au"?

"au" is the more common of the two: it sits at frequency rank #24 in our French list, against #48,918 for "apu". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Eye-level mix-up between "apu" and "au" is sorted above. Next: full entries or other pairs that share a letter shape.

Full dictionary entry for "apu" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "au" - compare definitions side by side with the headword page. Word entry
This pair ranks #174,814 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"apu" and "au" also get mixed up with nearby pairs, the highest-scored neighbour is "apu vs aur". Nearby pair

Confusion rank #174,814 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.