aesvsassWhich spelling fits?

Quick tell: aes is a adjective, ass is a verb, so they fill different roles in a sentence.

Which to use

“aes” is an adjective and “ass” is a verb - they look or sound alike but fill different roles in a sentence.

#43,355
“aes” frequency rank
#25,907
“ass” frequency rank
69262
confusion score

Side-by-Side Comparison

Feature aes ass
Definition Fácil. Primera y tercera personas del singular del pretérito imperfecto de indicativo de essen.

Where the eye mixes aes and ass

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

3 ch
aes
3 ch
ass

Look-alike desk: aes vs ass

These two trip readers on the page rather than in the ear: aes is [ˈɛːs] while ass is [a:s]. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - e in “aes” becomes s in “ass”, and the parts of speech differ too (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 69262, derived from the frequency rank of both members and their visual similarity.

aes is recorded at frequency rank #43,355, classified as anadj, pronounced [ˈɛːs]. ass is at rank #25,907, tagged as averb, pronounced [a:s].

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 69262, this pair ranks #32,392 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of aes vs ass

Shared letters: as. Private to "aes": e. Private to "ass": -.

"aes" · 3 letters · shape VVC  ·  "ass" · 3 letters · shape VCC

Frequently Asked Questions

Can "aes" and "ass" be used interchangeably?
No - they are not even the same part of speech. "aes" is an adjective and "ass" a verb, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "aes" or "ass" show up more?
"ass" is the more common of the two: it sits at frequency rank #25,907 in our Spanish list, against #43,355 for "aes". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

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 "aes" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "ass" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #32,392 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "aes" and "ass" also get mixed up with nearby pairs, the highest-scored neighbour is "aes vs apis". Nearby pair

Confusion rank #32,392 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