ninja
/ˈnɪnd͡ʒə/
"ninja" is a 5-letter English headword indexed on PlainSpell.
The verdict
“ninja” is a regularly-used English word, ranked #8,700 in English word frequency and used as a noun.
- #8,700
- frequency rank, English
- 5
- letters
- 7
- tracked misspellings
- 10
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A person trained in ninjutsu, especially (historical) one used for espionage, assassination, and other tasks requiring stealth during Japan's shogunate period.
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 | ninja |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈnɪnd͡ʒə/ |
| Letters | 5 |
| Frequency rank | #8,700 |
| Misspellings tracked | 7 |
| Confusable pairs | 10 |
| Source | Wiktionary (kaikki.org) |
Where “ninja” sits in English frequency
Spelling & Dictionary Insight
The English entry for ninja is 5 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈnɪnd͡ʒə/. Corpus data places it at rank #8,700 in overall English word frequency, indicating it appears regularly in written and spoken text. Wiktionary records 8 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 7 likely wrong-spelling variants for ninja, with forms such as "innja", "nijna", and "ninaj". 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 10 confusable-pair relationships, "ninth", "Nisha", "nia", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: A romanized borrowing of Japanese 忍者 (ninja), popularized within Japanese by manga after World War II and in English by Eric Van Lustbader's 1980 novel The Ninja and the 1981 movie Enter the Ninja, of uncertain derivation but with an underlying sense of sec… The correct English form is ninja, spelled N-I-N-J-A.
Definition
- 1A person trained in ninjutsu, especially (historical) one used for espionage, assassination, and other tasks requiring stealth during Japan's shogunate period.
- 2A person considered similarly skillful to the historical ninja, especially in covert or stealthy operation.
- 3A person considered similarly skillful to the historical ninja, especially in covert or stealthy operation.
- 4A person considered similarly skillful to the historical ninja, especially in covert or stealthy operation.
- 5A person considered to look like the historical ninja in some way, including (historical slang) an amateur private miner in Mongolia.
- 6Synonym of nigga as a friendly term of address.
- 7Synonym of nigga as a friendly term of address.
- 8nigger.
Etymology
A romanized borrowing of Japanese 忍者 (ninja), popularized within Japanese by manga after World War II and in English by Eric Van Lustbader's 1980 novel The Ninja and the 1981 movie Enter the Ninja, of uncertain derivation but with an underlying sense of secret or hidden person. The “Mongolian miner” sense arose from the supposed resemblance of the bowls used to wash ore with mercury to the shells of the Teenage Mutant Ninja Turtles. The Juggalo slang sense arose via influence from AAVE nigga.
This word in other languages
Common misspellings
Also misspelled as: innja,nijna,ninaj,ninjja,ninnja,nnija,nninja
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of ninja - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
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 "ninja"?
What does "ninja" mean?
What words are commonly confused with "ninja"?
How do you pronounce "ninja"?
What is the origin of the word "ninja"?
Is PlainSpell free to use?
Using “ninja”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is N-I-N-J-A - every other letter order is a misspelling in standard orthography.
- Say it as /ˈnɪnd͡ʒə/ (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. ninja 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.