piojovsposoWhich spelling fits?

Which to use

“piojo” and “poso” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#32,804
“piojo” frequency rank
#46,740
“poso” frequency rank
79544
confusion score

Side-by-Side Comparison

Feature piojo poso
Definition (orden Phthiraptera) Cualquiera de más de 3000 especies de insectos ápteros adaptados para parasitar virtualmente todas las especies de mamíferos y aves, cuya sangre consumen, alojándose en el cabello del cuerpo y la cabeza. Su cuerpo está diseñado para este hábitat, con el primer par de patas modificado para permitir la sujeción al cabello. Son extremadamente fértiles, depositando las hembras hasta unos 200 huevos en los 30 días de su vida adulta. Tienen el cuerpo aplanado y de color oscuro o pardoamarillento. La infestación con piojos se denomina pediculosis, y provoca comezón, además de funcionar como vector para otras enfermedades —en particular el tifus— y provocar anemia en casos agudos. 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 piojo and poso

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence. piojo runs 5 letters (CVVCV) against poso's 4 (CVCV) - the length gap alone is often enough to separate them once you know to check it.

5 ch
piojo
4 ch
poso

Why the eye confuses piojo with poso

A purely visual mix-up. piojo ([ˈpjoxo]) and poso ([ˈposo]) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 79544, derived from the frequency rank of both members and their visual similarity.

piojo is recorded at frequency rank #32,804, classified as anoun, pronounced [ˈpjoxo]. 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 79544, this pair ranks #12,846 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of piojo vs poso

Shared letters: op. Private to "piojo": ij. Private to "poso": s.

"piojo" · 5 letters · shape CVVCV  ·  "poso" · 4 letters · shape CVCV

Known mistypes of this pair

  • piojo ← ipojo · pijoo · piojjo · piooj · poijo · ppiojo
  • poso ← opso · poos · posso · pposo · psoo

Frequently Asked Questions

Do "piojo" and "poso" mean the same thing in a sentence?
No. They are said differently ([ˈpjoxo] versus [ˈposo]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Frequency check: "piojo" vs "poso" - which ranks higher?
"piojo" is the more common of the two: it sits at frequency rank #32,804 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.

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 "piojo" 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 #12,846 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "piojo" 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 #12,846 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