pecvspusWhat's the difference?

Which to use

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

#47,251
“pec” frequency rank
#28,336
“pus” frequency rank
75587
confusion score

Side-by-Side Comparison

Feature pec pus
Definition The pectoralis major muscle. A whitish-yellow or yellow substance composed primarily of dead white blood cells and dead pyogenic bacteria, normally found in regions of bacterial infection.

Letter map: pec vs pus

Shared letters muted; letters that set pec and pus apart highlighted. Shared run: 1. pec and pus follow the identical consonant-vowel pattern (CVC). Same shape at a glance is often the real trap, independent of shared letters.

3 ch
pec
3 ch
pus

Corpus notes: pec and pus

pec and pus are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 75587, derived from the frequency rank of both members and their visual similarity.

pec is recorded at frequency rank #47,251, classified as anoun. pus is at rank #28,336, tagged as anoun, pronounced /pʌs/.

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 75587, this pair ranks #32,667 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of pec vs pus

Shared letters: p. Private to "pec": ce. Private to "pus": su.

"pec" · 3 letters · shape CVC  ·  "pus" · 3 letters · shape CVC

Frequently Asked Questions

Is swapping "pec" for "pus" ever safe?
No. They share most of their letters but differ in 2 positions, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.
Which is more common, "pec" or "pus"?
"pus" is the more common of the two: it sits at frequency rank #28,336 in our English list, against #47,251 for "pec". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

You've compared "pec" and "pus". Here's where to go from here.

  • Full dictionary entry for "pec" 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 #32,667 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "pec" and "pus" also get mixed up with nearby pairs, the highest-scored neighbour is "pec vs PPA". Nearby pair

Confusion rank #32,667 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list