casivsCatoWhat's the difference?

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

Which to use

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

#221
“casi” frequency rank
#33,483
“Cato” frequency rank
33704
confusion score

Side-by-Side Comparison

Feature casi Cato
Definition Que por poca diferencia no es, que tiene mucha semejanza. Hipocorístico de Ricardo.

Where the eye mixes casi and Cato

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

4 ch
casi
4 ch
Cato

Why the eye confuses casi with Cato

These two trip readers on the page rather than in the ear: casi is [ˈkasi] while Cato is [ˈkat̪o]. 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 name), which is usually the fastest check. Our composite confusion score for this pair is 33704, derived from the frequency rank of both members and their visual similarity.

casi is recorded at frequency rank #221, classified as anadv, pronounced [ˈkasi]. Cato is at rank #33,483, tagged as aname, pronounced [ˈkat̪o].

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 33704, this pair ranks #195,337 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of casi vs Cato

Shared letters: ac. Private to "casi": is. Private to "Cato": ot.

"casi" · 4 letters · shape CVCV  ·  "Cato" · 4 letters · shape CVCV

Known mistypes of this pair

  • casiacsi · caci · cais · cassi · ccasi · csai
  • Catocaot · catto · ccato · ctao

Frequently Asked Questions

Can "casi" and "Cato" be used interchangeably?
No - they are not even the same part of speech. "casi" is an adverb and "Cato" a name, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "casi" or "Cato"?
"casi" is the more common of the two: it sits at frequency rank #221 in our Spanish list, against #33,483 for "Cato". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

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 "casi" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "Cato" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #195,337 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "casi" and "Cato" also get mixed up with nearby pairs, the highest-scored neighbour is "Cato vs catre". 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 #195,337 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