asmavsasoTell them apart

Quick tell: asma is a noun, aso is a verb, so they fill different roles in a sentence.

Which to use

“asma” is a noun and “aso” is a verb - they look or sound alike but fill different roles in a sentence.

#15,015
“asma” frequency rank
#37,435
“aso” frequency rank
52450
confusion score

Side-by-Side Comparison

Feature asma aso
Definition Enfermedad inflamatoria del aparato respiratorio que provoca dificultad en la respiración (disnea). Primera persona del singular (yo) del presente de indicativo de asar.

Where the eye mixes asma and aso

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

4 ch
asma
3 ch
aso

Visual trap between asma and aso

These two trip readers on the page rather than in the ear: asma is [ˈasma] while aso is [ˈaso]. 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 verb), which is usually the fastest check. Our composite confusion score for this pair is 52450, derived from the frequency rank of both members and their visual similarity.

asma is recorded at frequency rank #15,015, classified as anoun, pronounced [ˈasma]. aso is at rank #37,435, tagged as averb, pronounced [ˈaso].

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 52450, this pair ranks #92,633 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of asma vs aso

Shared letters: as. Private to "asma": m. Private to "aso": o.

"asma" · 4 letters · shape VCCV  ·  "aso" · 3 letters · shape VCV

Known mistypes of this pair

  • asmaasam · asmma · assma

Frequently Asked Questions

Can "asma" and "aso" be used interchangeably?
No - they are not even the same part of speech. "asma" is a noun and "aso" a verb, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "asma" or "aso" show up more?
"asma" is the more common of the two: it sits at frequency rank #15,015 in our Spanish list, against #37,435 for "aso". 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 "asma" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "aso" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #92,633 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "asma" and "aso" also get mixed up with nearby pairs, the highest-scored neighbour is "alió vs aso". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #92,633 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