casivscatsTell them apart

Quick tell: casi is a adverb, cats is a noun, so they fill different roles in a sentence.

Which to use

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

#221
“casi” frequency rank
#47,632
“cats” frequency rank
47853
confusion score

Side-by-Side Comparison

Feature casi cats
Definition Que por poca diferencia no es, que tiene mucha semejanza. Forma del plural de cat.

Where the eye mixes casi and cats

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.

4 ch
casi
4 ch
cats

Look-alike desk: casi vs cats

These two trip readers on the page rather than in the ear: casi is [ˈkasi] while cats is /kæts/. 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 (adverb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 47853, derived from the frequency rank of both members and their visual similarity.

casi is recorded at frequency rank #221, classified as anadv, pronounced [ˈkasi]. cats is at rank #47,632, tagged as anoun, pronounced /kæts/.

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 47853, this pair ranks #117,745 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of casi vs cats

Shared letters: acs. Private to "casi": i. Private to "cats": t.

"casi" · 4 letters · shape CVCV  ·  "cats" · 4 letters · shape CVCC

Known mistypes of this pair

  • casiacsi · caci · cais · cassi · ccasi · csai
  • catsacts · catss · catts · ccats · ctas

Frequently Asked Questions

Do "casi" and "cats" mean the same thing in a sentence?
No - they are not even the same part of speech. "casi" is an adverb and "cats" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "casi" or "cats"?
"casi" is the more common of the two: it sits at frequency rank #221 in our Spanish list, against #47,632 for "cats". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "casi" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "cats" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #117,745 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "casi" and "cats" also get mixed up with nearby pairs, the highest-scored neighbour is "catre vs cats". 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 #117,745 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