ácidavsacosaWhich spelling fits?

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

Which to use

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

#29,897
“ácida” frequency rank
#33,908
“acosa” frequency rank
63805
confusion score

Side-by-Side Comparison

Feature ácida acosa
Definition Forma del femenino singular de ácido. Tercera persona del singular (él, ella, ello; usted, 2.ª persona) del presente de indicativo de acosar.

Where the eye mixes ácida and acosa

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. ácida and acosa follow the identical consonant-vowel pattern (VCVCV). Same shape at a glance is often the real trap, independent of shared letters.

5 ch
ácida
5 ch
acosa

Visual trap between ácida and acosa

These two trip readers on the page rather than in the ear: ácida is [ˈasið̞a] while acosa is [aˈkosa]. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 3 positions, and the parts of speech differ too (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 63805, derived from the frequency rank of both members and their visual similarity.

ácida is recorded at frequency rank #29,897, classified as anadj, pronounced [ˈasið̞a]. acosa is at rank #33,908, tagged as averb, pronounced [aˈkosa].

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 63805, this pair ranks #47,550 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of ácida vs acosa

Shared letters: ac. Private to "ácida": diá. Private to "acosa": os.

"ácida" · 5 letters · shape VCVCV  ·  "acosa" · 5 letters · shape VCVCV

Known mistypes of this pair

  • acosa ← accosa · acoas · acossa · acsoa · aocsa · caosa

Frequently Asked Questions

Do "ácida" and "acosa" mean the same thing in a sentence?
No - they are not even the same part of speech. "ácida" is an adjective and "acosa" a verb, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "ácida" or "acosa"?
"ácida" is the more common of the two: it sits at frequency rank #29,897 in our Spanish list, against #33,908 for "acosa". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

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

  • Full dictionary entry for "ácida" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "acosa" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #47,550 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "ácida" and "acosa" also get mixed up with nearby pairs, the highest-scored neighbour is "acosa vs acuosa". 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 #47,550 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