Which to use
“USP” and “USPS” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #33,071
- “USP” frequency rank
- #23,149
- “USPS” frequency rank
- 56220
- confusion score
Side-by-Side Comparison
| Feature | USP | USPS |
|---|---|---|
| Definition | The United States Pharmacopeial Convention, Inc., a standard-setting authority that publishes USP-NF standards about pharmaceuticals and dietary supplements. | Initialism of United States Postal Service. |
Letter map: USP vs USPS
Shared letters muted; letters that set USP and USPS apart highlighted. Shared run: 3.
Corpus notes: USP and USPS
USP and USPS 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 differ by 1 extra letter(s) - “USP” sits inside “USPS”. Our composite confusion score for this pair is 56220, derived from the frequency rank of both members and their visual similarity.
USP is recorded at frequency rank #33,071, classified as aname. USPS is at rank #23,149, tagged as aname, pronounced /ˌju ɛs pi ˈɛs/.
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 56220, this pair ranks #127,835 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of USP vs USPS
Shared letters: psu. Private to "USP": -. Private to "USPS": -.
"USP" · 3 letters · shape VCC · "USPS" · 4 letters · shape VCCC
Known mistypes of this pair
- USPS ← sups · upss · uspps · uspss · ussp · ussps
Frequently Asked Questions
Can "USP" and "USPS" be used interchangeably?
Frequency check: "USP" vs "USPS" - which ranks higher?
What to do next
Done with this confusable. These links stay specific to "USP" and "USPS".
- Full dictionary entry for "USP" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "USPS" - compare definitions side by side with the headword page. Word entry
- This pair ranks #127,835 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "USP" and "USPS" also get mixed up with nearby pairs, the highest-scored neighbour is "UAS vs USP". 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 #127,835 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.