píovsposoWhat's the difference?

Quick tell: pío is a adjective, poso is a noun, so they fill different roles in a sentence.

Which to use

“pío” is an adjective and “poso” is a noun - they look or sound alike but fill different roles in a sentence.

#12,038
“pío” frequency rank
#46,740
“poso” frequency rank
58778
confusion score

Side-by-Side Comparison

Feature pío poso
Definition Devoto, inclinado a la piedad, dado al culto de la religión y a las cosas pertenecientes al servicio de Dios y de los santos. Sólidos que estaban diluidos en un líquido y por la acción de la gravedad se depositan en el fondo del recipiente que lo contiene al líquido.

Where the eye mixes pío and poso

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. pío runs 3 letters (CVV) against poso's 4 (CVCV) - the length gap alone is often enough to separate them once you know to check it.

3 ch
pío
4 ch
poso

Visual trap between pío and poso

These two trip readers on the page rather than in the ear: pío is [ˈpio] while poso is [ˈposo]. 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 (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 58778, derived from the frequency rank of both members and their visual similarity.

pío is recorded at frequency rank #12,038, classified as anadj, pronounced [ˈpio]. poso is at rank #46,740, tagged as anoun, pronounced [ˈposo].

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 58778, this pair ranks #65,182 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of pío vs poso

Shared letters: op. Private to "pío": í. Private to "poso": s.

"pío" · 3 letters · shape CVV  ·  "poso" · 4 letters · shape CVCV

Known mistypes of this pair

  • poso ← opso · poos · posso · pposo · psoo

Frequently Asked Questions

Is swapping "pío" for "poso" ever safe?
No - they are not even the same part of speech. "pío" is an adjective and "poso" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "pío" or "poso" show up more?
"pío" is the more common of the two: it sits at frequency rank #12,038 in our Spanish list, against #46,740 for "poso". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

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

  • Full dictionary entry for "pío" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "poso" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #65,182 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "pío" and "poso" also get mixed up with nearby pairs, the highest-scored neighbour is "poso vs probo". 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 #65,182 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