pHvspusWhich spelling fits?

Which to use

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

#11,648
“pH” frequency rank
#26,976
“pus” frequency rank
38624
confusion score

Side-by-Side Comparison

Feature pH pus
Definition Cuantificador de acidez o de basicidad (alcalinidad) de soluciones químicas, referido a iones de hidronio (H₃O)⁺. Consta de una escala de cero a catorce donde el valor siete es neutro, cifras inferiores corresponden a substancias ácidas, y las superiores, a básicas (alcalinas). Sustancia blanquecina o amarillenta producida por el cuerpo durante procesos infecciosos. Está compuesto, principalmente, por microorganismos muertos, glóbulos blancos muertos, y restos de tejido dañado.

Where the eye mixes pH and pus

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

2 ch
pH
3 ch
pus

Why the eye confuses pH with pus

A purely visual mix-up. pH ([ˈf]) and pus ([ˈpus]) 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 38624, derived from the frequency rank of both members and their visual similarity.

pH is recorded at frequency rank #11,648, classified as anoun, pronounced [ˈf]. pus is at rank #26,976, tagged as anoun, pronounced [ˈpus].

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 38624, this pair ranks #168,991 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of pH vs pus

Shared letters: p. Private to "pH": h. Private to "pus": su.

"pH" · 2 letters · shape CC  ·  "pus" · 3 letters · shape CVC

Frequently Asked Questions

Is swapping "pH" for "pus" ever safe?
No. They are said differently ([ˈf] versus [ˈpus]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Which is more common, "pH" or "pus"?
"pH" is the more common of the two: it sits at frequency rank #11,648 in our Spanish list, against #26,976 for "pus". 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 "pH" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "pus" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #168,991 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "pH" and "pus" also get mixed up with nearby pairs, the highest-scored neighbour is "PRC vs pus". Nearby pair

Confusion rank #168,991 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