composite number
"composite-number" is a 15-letter English headword indexed on PlainSpell.
The verdict
“composite number” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 16
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A (nonzero) natural number that is expressible as the product of two (or more) natural numbers other than itself and 1.
| Property | Value |
|---|---|
| Headword | composite number |
| Language | English |
| Part of speech | Noun |
| Letters | 16 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “composite number” sits in English frequency
Rare enough to double-check
composite number is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "A (nonzero) natural number that is expressible as the product of two (or more) natural numbers other than itself and 1.".
No misspelling variants are generated for composite number in our index, since its letter pattern doesn't lend itself to common typo substitutions. This entry stands alone in our confusable dataset, since its spelling is unusual enough that it doesn't cluster with a lookalike.
Our source data has no etymology on file for this entry, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is composite number, spelled C-O-M-P-O-S-I-T-E- -N-U-M-B-E-R.
Definition
- 1A (nonzero) natural number that is expressible as the product of two (or more) natural numbers other than itself and 1.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “composite number”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is C-O-M-P-O-S-I-T-E- -N-U-M-B-E-R - every other letter order is a misspelling in standard orthography.
- 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.