ad vs aún, What's the Difference?

Which to use

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

#5,365
“ad” frequency rank: #240
“aún” frequency rank: 5605
confusion score

Side-by-Side Comparison

Feature	ad	aún
Definition	Nombre.	Indica que el hecho persiste en el presente, aunque pueda cambiar en lo sucesivo..

Where the eye mixes ad and aún

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

2 ch

3 ch

aún

Visual trap between ad and aún

These two trip readers on the page rather than in the ear: ad is [ɑd] while aún is [aˈũn]. 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 adverb), which is usually the fastest check. Our composite confusion score for this pair is 5605, derived from the frequency rank of both members and their visual similarity.

ad is recorded at frequency rank #5,365, classified as anoun, pronounced [ɑd]. 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 5605, this pair ranks #313,194 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of ad vs aún

Shared letters: a. Private to "ad": d. Private to "aún": nú.

"ad" · 2 letters · shape VC · "aún" · 3 letters · shape VVC

Frequently Asked Questions

Can "ad" and "aún" be used interchangeably?

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

In ordinary Spanish text, does "ad" or "aún" show up more?

"aún" is the more common of the two: it sits at frequency rank #240 in our Spanish list, against #5,365 for "ad". 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 "ad" and "aún" is sorted above. Next: full entries or other pairs that share a letter shape.

Full dictionary entry for "ad" 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 #313,194 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
"ad" and "aún" also get mixed up with nearby pairs, the highest-scored neighbour is "abed vs ad". Nearby pair

Confusion rank #313,194 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.