Which to use
“PCA” is a name and “per” is a preposition - they look or sound alike but fill different roles in a sentence.
- #33,786
- “PCA” frequency rank
- #339
- “per” frequency rank
- 34125
- confusion score
Side-by-Side Comparison
| Feature | PCA | per |
|---|---|---|
| Definition | Abbreviation of Proto-Central Algonquian. | For each. |
Letter map: PCA vs per
Shared letters muted; letters that set PCA and per apart highlighted. Shared run: 1.
Role in the sentence - PCA and per
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: PCA is aname and perapreposition. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 34125, derived from the frequency rank of both members and their visual similarity.
PCA is recorded at frequency rank #33,786, classified as aname. per is at rank #339, tagged as aprep, pronounced /pɜː/.
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 34125, this pair ranks #323,453 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of PCA vs per
Shared letters: p. Private to "PCA": ac. Private to "per": er.
"PCA" · 3 letters · shape CCV · "per" · 3 letters · shape CVC
Frequently Asked Questions
Can "PCA" and "per" be used interchangeably?
In ordinary English text, does "PCA" or "per" show up more?
What to do next
Pair "PCA" vs "per" is on the table, pick a follow-up below.
- Full dictionary entry for "PCA" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "per" - compare definitions side by side with the headword page. Word entry
- This pair ranks #323,453 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "PCA" and "per" also get mixed up with nearby pairs, the highest-scored neighbour is "PCA vs PPA". Nearby pair
Confusion rank #323,453 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.