asívsausWhat's the difference?

Quick tell: así is a adverb, aus is a noun, so they fill different roles in a sentence.

Which to use

“así” is an adverb and “aus” is a noun - they look or sound alike but fill different roles in a sentence.

#55
“así” frequency rank
#33,949
“aus” frequency rank
34004
confusion score

Side-by-Side Comparison

Feature así aus
Definition De este modo o forma. Forma del plural de au.

Where the eye mixes así and aus

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

3 ch
así
3 ch
aus

Look-alike desk: así vs aus

These two trip readers on the page rather than in the ear: así is [aˈsi] while aus is [aws]. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (adverb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 34004, derived from the frequency rank of both members and their visual similarity.

así is recorded at frequency rank #55, classified as anadv, pronounced [aˈsi]. aus is at rank #33,949, tagged as anoun, pronounced [aws].

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 34004, this pair ranks #193,726 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of así vs aus

Shared letters: as. Private to "así": í. Private to "aus": u.

"así" · 3 letters · shape VCV  ·  "aus" · 3 letters · shape VVC

Frequently Asked Questions

Is swapping "así" for "aus" ever safe?
No - they are not even the same part of speech. "así" is an adverb and "aus" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "así" or "aus" show up more?
"así" is the more common of the two: it sits at frequency rank #55 in our Spanish list, against #33,949 for "aus". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

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

  • Full dictionary entry for "así" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "aus" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #193,726 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "así" and "aus" also get mixed up with nearby pairs, the highest-scored neighbour is "apis vs aus". Nearby pair

Confusion rank #193,726 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list