actvsaúnWhich spelling fits?

Quick tell: act is a noun, aún is an adverb, so they fill different roles in a sentence.

Which to use

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

#15,000
“act” frequency rank
#240
“aún” frequency rank
15240
confusion score

Side-by-Side Comparison

Feature act aún
Definition Acto, acción. Indica que el hecho persiste en el presente, aunque pueda cambiar en lo sucesivo..

Where the eye mixes act and aún

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

3 ch
act
3 ch
aún

Visual trap between act and aún

These two trip readers on the page rather than in the ear: act is /ækt/ while aún is [aˈũn]. 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 (noun vs adverb), which is usually the fastest check. Our composite confusion score for this pair is 15240, derived from the frequency rank of both members and their visual similarity.

act is recorded at frequency rank #15,000, classified as anoun, pronounced /ækt/. aún is at rank #240, tagged as anadv, pronounced [aˈũn].

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 15240, this pair ranks #280,984 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of act vs aún

Shared letters: a. Private to "act": ct. Private to "aún": .

"act" · 3 letters · shape VCC  ·  "aún" · 3 letters · shape VVC

Frequently Asked Questions

Is swapping "act" for "aún" ever safe?
No - they are not even the same part of speech. "act" is a noun and "aún" an adverb, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "act" or "aún" show up more?
"aún" is the more common of the two: it sits at frequency rank #240 in our Spanish list, against #15,000 for "act". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "act" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "aún" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #280,984 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "act" and "aún" also get mixed up with nearby pairs, the highest-scored neighbour is "act vs anta". Nearby pair

Confusion rank #280,984 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