moon
/muːn/
"moon" is a 4-letter English headword indexed on PlainSpell.
The verdict
“moon” is a regularly-used English word, ranked #2,048 in English word frequency and used as a proper noun.
- #2,048
- frequency rank, English
- 4
- letters
- 4
- tracked misspellings
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Alternative letter-case form of Moon (“the Earth's only permanent natural satellite”).
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 | moon |
| Language | English |
| Part of speech | Proper noun |
| IPA | /muːn/ |
| Letters | 4 |
| Frequency rank | #2,048 |
| Misspellings tracked | 4 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “moon” sits in English frequency
Spelling & Dictionary Insight
The English entry for moon is 4 letters long, classified as a proper noun, and transcribed in the International Phonetic Alphabet as /muːn/. Corpus data places it at rank #2,048 in overall English word frequency, indicating it appears regularly in written and spoken text. The dominant gloss from Wiktionary reads: "Alternative letter-case form of Moon (“the Earth's only permanent natural satellite”).".
Our generated misspelling index lists 4 likely wrong-spelling variants for moon, with forms such as "mmoon", "mono", and "moonn". 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 20 confusable-pair relationships, "MoS", "mop", "MOR", and more, where similar look or sound leads writers to substitute one word for another in context.
Etymologically, the entry records: From Middle English mone, from Old English mōna (“moon”), from Proto-West Germanic *mānō, from Proto-Germanic *mēnô (“moon”), from Proto-Indo-European *mḗh₁n̥s (“moon, month”), probably from *meh₁- (“to measure”). cognates and doublets Cognate with Scots mo… The correct English form is moon, spelled M-O-O-N.
Definition
- 1Alternative letter-case form of Moon (“the Earth's only permanent natural satellite”).
Etymology
From Middle English mone, from Old English mōna (“moon”), from Proto-West Germanic *mānō, from Proto-Germanic *mēnô (“moon”), from Proto-Indo-European *mḗh₁n̥s (“moon, month”), probably from *meh₁- (“to measure”). cognates and doublets Cognate with Scots mone, mune, muin (“moon”), North Frisian muun (“moon”), Saterland Frisian Moune (“moon”), West Frisian moanne (“moon”), Dutch maan (“moon”), German Mond (“moon”), Danish måne (“moon”), Norwegian Bokmål måne (“moon”), Norwegian Nynorsk måne (“moon”), Swedish måne (“moon”), Faroese máni (“moon”), Icelandic máni (“moon”), Latin mēnsis (“month”). See also month, a related term within Indo-European. The usage of "moon" to refer to the act reflected its use as a metaphor for the buttocks since 1743. It was popularised from American student slang in the 1960s.
Common misspellings
Also misspelled as: mmoon,mono,moonn,omon
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of moon - 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 “moon”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is M-O-O-N - every other letter order is a misspelling in standard orthography.
- Say it as /muːn/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “MoS” - see the side-by-side comparison. moon vs MoS
- 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.