USP
"usp" is a 3-letter English headword indexed on PlainSpell.
The verdict
“USP” is a moderately-common English word, ranked #33,071 in English word frequency and used as a proper noun.
- #33,071
- frequency rank, English
- 3
- letters
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The United States Pharmacopeial Convention, Inc., a standard-setting authority that publishes USP-NF standards about pharmaceuticals and dietary supplements.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | USP |
| Language | English |
| Part of speech | Proper noun |
| Letters | 3 |
| Frequency rank | #33,071 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “USP” sits in English frequency
Spelling & Dictionary Insight
The English entry for USP is 3 letters long, classified as a proper noun. Corpus data places it at rank #33,071 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.
No generated misspelling entries exist for USP in our index, which points to an orthography that plays by predictable English rules. It also participates in 20 confusable-pair relationships, "UT", "UV", "UW", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: Initialism of United States Pharmacopeia. The correct English form is USP, spelled U-S-P.
Definition
- 1The United States Pharmacopeial Convention, Inc., a standard-setting authority that publishes USP-NF standards about pharmaceuticals and dietary supplements.
- 2The United States Pharmacopeia, the published standards.
Etymology
Initialism of United States Pharmacopeia.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
How do you spell "USP"?
What does "USP" mean?
What words are commonly confused with "USP"?
What is the origin of the word "USP"?
Is PlainSpell free to use?
Using “USP”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is U-S-P - every other letter order is a misspelling in standard orthography.
- Don't mix it up with “UT” - see the side-by-side comparison. USP vs UT
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.