NP
"np" is a 2-letter English headword indexed on PlainSpell.
The verdict
“NP” is a moderately-common English word, ranked #13,570 in English word frequency and used as a noun.
- #13,570
- frequency rank, English
- 2
- letters
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of notary public.
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 | NP |
| Language | English |
| Part of speech | Noun |
| Letters | 2 |
| Frequency rank | #13,570 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “NP” sits in English frequency
Spelling & Dictionary Insight
The English entry for NP is 2 letters long, classified as a noun. Corpus data places it at rank #13,570 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 7 distinct senses for this headword, so context determines which meaning a reader should apply.
Zero misspellings are on record for NP in our index, since its letter sequence doesn't invite the usual edit-distance slips. It also participates in 20 confusable-pair relationships, "NZ", "NT", "nu", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
This headword's origin isn't recorded in our source data, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is NP, spelled N-P.
Definition
- 1Initialism of notary public.
- 2Initialism of nurse practitioner.
- 3Initialism of national park.
- 4Initialism of noun phrase.
- 5Initialism of nanoparticle.
- 6Abbreviation of nondeterministic polynomial, the complexity class of computational problems that a nondeterministic Turing machine can solve in polynomial time.
- 7Abbreviation of nosocomial pneumonia.
This word in other languages
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
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Using “NP”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is N-P - every other letter order is a misspelling in standard orthography.
- Don't mix it up with “NZ” - see the side-by-side comparison. NP vs NZ
- 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.