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PlainSpell

moo

/muː/noun, verb, interjection

moo is spelled M-O-O: 3 letters and one syllable. It appears 1.4 times per million words in written English, the 23,835th most frequent word form (wordfreq, 2021 data). As a noun, moo means “The characteristic lowing sound made by cattle” (English Wiktionary, September 2026). The plural of moo is moos.

How many letters and syllables are in moo?

Letters3: M-O-O
Syllables1 (from its American pronunciation)
In writing1.4 times per million words; the 23,835th most frequent word form
Wrong spellings searchednone measured in search
Sounds like
Same letters

Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); rhymes and same-letter words are computed by PlainSpell from its own word list.

How common is moo?

Moo appears 1.4 times per million words in written English, the 23,835th most frequent word form in the list.

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).

How do you pronounce moo?

  • /muː/

Moo has one syllable (counted from its American pronunciation in the CMU Pronouncing Dictionary).

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: En-us-moo.ogg, Wikimedia Commons (author and licence on each file's page).

Words people confuse with moo

Sounds like: moue (Wiktionary's homophone list; some hold only in some accents).

Also written: moe.

Sources: English Wiktionary (homophones, alternative spellings).

What rhymes with moo?

No other word on PlainSpell ends in the same sounds as moo.

Spelled with the same letters in another order: omo, oom.

Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).

Forms of moo

  • moos plural, present, singular, he/she/it
  • mooing participle, present
  • mooed participle, past

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What does moo mean?

The meanings the English Wiktionary records, quoted as written there (source below).

noun

  1. 1

    The characteristic lowing sound made by cattle.

  2. 2

    UKderogatoryslangA foolish woman.

    You silly moo! What did you do that for?

verb

  1. 1

    Of a cow or bull, to make its characteristic lowing sound.

interjection

  1. 1

    The characteristic sound made by a cow or bull.

    The cow says moo.

noun

as MOO
  1. 1

    Initialism of matter of opinion.

  2. 2

    Initialism of MUD, object-oriented.

  3. 3

    datedInitialism of Money Order Office.

  4. 4

    Initialism of massive overdense object.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

Moo in Spanish, French, German and Portuguese

LanguageWords
Frenchmeuglement, beuglement (characteristic sound made by a cow or bull), meugler, beugler, mugir (to make a lowing sound), meuh (sound made by a cow or bull)
GermanMuhen (characteristic sound made by a cow or bull), muhen (to make a lowing sound), muh (sound made by a cow or bull)
Portuguesemugido (characteristic sound made by a cow or bull), mugir (to make a lowing sound), mu (sound made by a cow or bull)
Spanishmugido, mu (characteristic sound made by a cow or bull), mugir (to make a lowing sound)

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.

Where does moo come from?

Onomatopoeic.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

What to look up after moo