complement
/ˈkɒmpləmənt/
"complement" is a 10-letter English headword indexed on PlainSpell.
The verdict
“complement” is a moderately-common English word, ranked #10,019 in English word frequency and used as a noun.
- #10,019
- frequency rank, English
- 10
- letters
- 16
- tracked misspellings
- 5
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The totality, the full amount or number which completes something.
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 | complement |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈkɒmpləmənt/ |
| Letters | 10 |
| Frequency rank | #10,019 |
| Misspellings tracked | 16 |
| Confusable pairs | 5 |
| Source | Wiktionary (kaikki.org) |
Where “complement” sits in English frequency
Spelling & Dictionary Insight
The English entry for complement is 10 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈkɒmpləmənt/. Corpus data places it at rank #10,019 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 22 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 16 likely wrong-spelling variants for complement, with forms such as "ccomplement", "cmoplement", and "comlpement". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 5 confusable-pair relationships, "compliment", "compliments", "complemented", and more, where similar look or sound leads writers to substitute one word for another in context.
Etymologically, the entry records: From Middle English complement, from Latin complēmentum (“that which fills up or completes”), from compleō (“to fill up; to complete”) (English complete). Doublet of compliment. The verb is from the noun. The correct English form is complement, spelled C-O-M-P-L-E-M-E-N-T.
Definition
- 1The totality, the full amount or number which completes something.
- 2The whole working force of a vessel.
- 3An angle which, together with a given angle, makes a right angle.
- 4Something which completes, something which combines with something else to make up a complete whole; loosely, something perceived to be a harmonious or desirable partner or addition.
- 5A word or group of words that completes a grammatical construction in the predicate and that describes or is identified with the subject or object.
- 6A phonetic complement is a graphic element that modifies another, such as (in Linear B script) a small syllabogram that is attached to a logogram as an abbreviation of its reading (as opposed to an adjunct that abbreviates an adjective that modifies that logogram).
- 7An interval which, together with the given interval, makes an octave.
- 8The color which, when mixed with the given color, gives black (for mixing pigments) or white (for mixing light).
- 9Given two sets, the set containing one set's elements that are not members of the other set (whether a relative complement or an absolute complement).
- 10One of several blood proteins that work with antibodies during an immune response.
- 11An expression related to some other expression such that it is true under the same conditions that make other false, and vice versa.
- 12A voltage level with the opposite logical sense to the given one.
- 13A bit with the opposite value to the given one; the logical complement of a number.
- 14The diminished radix complement of a number; the nines' complement of a decimal number; the ones' complement of a binary number.
- 15The radix complement of a number; the two's complement of a binary number.
- 16The numeric complement of a number.
- 17A nucleotide sequence in which each base is replaced by the complementary base of the given sequence: adenine (A) by thymine (T) or uracil (U), cytosine (C) by guanine (G), and vice versa.
- 18Synonym of alexin.
- 19Abbreviation of complementary good.
- 20Something (or someone) that completes; the consummation.
- 21The act of completing something, or the fact of being complete; completion, completeness, fulfilment.
- 22Something which completes one's equipment, dress etc.; an accessory.
Etymology
From Middle English complement, from Latin complēmentum (“that which fills up or completes”), from compleō (“to fill up; to complete”) (English complete). Doublet of compliment. The verb is from the noun.
This word in other languages
Common misspellings
Also misspelled as: ccomplement,cmoplement,comlpement,commplement,compelment,compleemnt,complemennt,complementt,complemetn,complemment,complemnet,compllement,complmeent,compplement,copmlement,ocmplement
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of complement - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.
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 “complement”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is C-O-M-P-L-E-M-E-N-T - every other letter order is a misspelling in standard orthography.
- Say it as /ˈkɒmpləmənt/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “compliment” - see the side-by-side comparison. complement vs compliment
- 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.