aut vs autos, What's the Difference?

Which to use

“aut” is a conjunction and “autos” is a noun - they look or sound alike but fill different roles in a sentence.

#40,662
“aut” frequency rank: #2,281
“autos” frequency rank: 42943
confusion score

Side-by-Side Comparison

Feature	aut	autos
Definition	O	Forma del plural de auto.

Where the spellings diverge

Shared letters are muted; the letters that actually set aut and autos apart are highlighted. They share 3 letters in sequence, which is exactly why the eye skips the difference.

3 ch

aut

5 ch

autos

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: aut is /ˈawt/ while autos is [ˈawt̪os]. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “aut” sits inside “autos”, and the parts of speech differ too (conjunction vs noun), which is usually the fastest check. Our composite confusion score for this pair is 42943, derived from the frequency rank of both members and their visual similarity.

aut is recorded at frequency rank #40,662, classified as aconj, pronounced /ˈawt/. autos is at rank #2,281, tagged as anoun, pronounced [ˈawt̪os].

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 42943, this pair ranks #145,415 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of aut vs autos

Shared letters: atu. Private to "aut": -. Private to "autos": os.

"aut" · 3 letters · shape VVC · "autos" · 5 letters · shape VVCVC

Known mistypes of this pair

autos ← atuos · auots · autoss · autso · auttos · uatos

Frequency comparison

aut#40,662

autos#2,281

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "aut" and "autos" be used interchangeably?

No - they are not even the same part of speech. "aut" is a conjunction and "autos" a noun, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "aut" or "autos"?

"autos" is the more common of the two: it sits at frequency rank #2,281 in our Spanish list, against #40,662 for "aut". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Remembering aut vs autos

The fastest way to pick the right one every time.

Check the role first: if you need a conjunction, it's “aut”; for a noun, it's “autos”.
See each word in full, definition, IPA, etymology and its other confusables. Full “aut” entry
Browse more pairs most likely to be confused. Most confusable