aitvsautoWhich spelling fits?

Quick tell: ait is a verb, auto is a noun, so they fill different roles in a sentence.

Which to use

“ait” is a verb and “auto” is a noun - they look or sound alike but fill different roles in a sentence.

#538
“ait” frequency rank
#1,803
“auto” frequency rank
2341
confusion score

Side-by-Side Comparison

Feature ait auto
Definition Troisième personne du singulier du subjonctif présent du verbe auxiliaire avoir. Automobile.

Where the eye mixes ait and auto

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

3 ch
ait
4 ch
auto

Why the eye confuses ait with auto

These two trip readers on the page rather than in the ear: ait is \ɛ\ while auto is \o.to\. 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 (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 2341, derived from the frequency rank of both members and their visual similarity.

ait is recorded at frequency rank #538, classified as averb, pronounced \ɛ\. auto is at rank #1,803, tagged as anoun, pronounced \o.to\.

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 2341, this pair ranks #436,318 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of ait vs auto

Shared letters: at. Private to "ait": i. Private to "auto": ou.

"ait" · 3 letters · shape VVC  ·  "auto" · 4 letters · shape VVCV

Known mistypes of this pair

  • autoatuo · auot · autto · uato

Frequently Asked Questions

Is swapping "ait" for "auto" ever safe?
No - they are not even the same part of speech. "ait" is a verb and "auto" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "ait" or "auto"?
"ait" is the more common of the two: it sits at frequency rank #538 in our French list, against #1,803 for "auto". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

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

  • Full dictionary entry for "ait" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "auto" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #436,318 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "ait" and "auto" also get mixed up with nearby pairs, the highest-scored neighbour is "aur vs auto". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #436,318 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list