ninety
/ˈnaɪn.ti/
"ninety" is a 6-letter English headword indexed on PlainSpell.
The verdict
“ninety” is a moderately-common English word, ranked #11,078 in English word frequency and used as a numeral.
- #11,078
- frequency rank, English
- 6
- letters
- 9
- tracked misspellings
- 8
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - The cardinal number occurring after eighty-nine and before ninety-one, represented in Roman numerals as XC and in Arabic numerals as 90.
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 | ninety |
| Language | English |
| Part of speech | Numeral |
| IPA | /ˈnaɪn.ti/ |
| Letters | 6 |
| Frequency rank | #11,078 |
| Misspellings tracked | 9 |
| Confusable pairs | 8 |
| Source | Wiktionary (kaikki.org) |
Where “ninety” sits in English frequency
Spelling & Dictionary Insight
The English entry for ninety is 6 letters long, classified as a numeral, and transcribed in the International Phonetic Alphabet as /ˈnaɪn.ti/. Corpus data places it at rank #11,078 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "The cardinal number occurring after eighty-nine and before ninety-one, represented in Roman numerals as XC and in Arabic numerals as 90.".
Our generated misspelling index lists 9 likely wrong-spelling variants for ninety, with forms such as "innety", "nienty", and "ninetty". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 8 confusable-pair relationships, "ninth", "nitty", "nine", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
Etymologically, the entry records: From Middle English nynty, nynety, from Old English hundniġontiġ, from Proto-Germanic *newuntēhundą (“ninety”), equivalent to nine + -ty. Cognate with Scots nynty, nynety (“ninety”), Saterland Frisian njuugentich (“ninety”), West Frisian njoggentich (“ninet… The correct English form is ninety, spelled N-I-N-E-T-Y.
Definition
- 1The cardinal number occurring after eighty-nine and before ninety-one, represented in Roman numerals as XC and in Arabic numerals as 90.
Etymology
From Middle English nynty, nynety, from Old English hundniġontiġ, from Proto-Germanic *newuntēhundą (“ninety”), equivalent to nine + -ty. Cognate with Scots nynty, nynety (“ninety”), Saterland Frisian njuugentich (“ninety”), West Frisian njoggentich (“ninety”), Dutch negentig (“ninety”), German Low German negentig (“ninety”), German neunzig (“ninety”), Swedish nittio (“ninety”), Norwegian Bokmål nitti (“ninety”), Norwegian Nynorsk nitti (“ninety”), Icelandic níutíu (“ninety”).
Synonyms
This word in other languages
Common misspellings
Also misspelled as: innety,nienty,ninetty,ninetyy,nineyt,ninnety,nintey,nniety,nninety
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of ninety - 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 “ninety”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is N-I-N-E-T-Y - every other letter order is a misspelling in standard orthography.
- Say it as /ˈnaɪn.ti/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “ninth” - see the side-by-side comparison. ninety vs ninth
- 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.