How do you pronounce "costumes"?

In American English: /kɑːˈstuːmz/ (kah-STOOMZ). In British English: /kˈɒstjuːmz/ (K-osty). In Canadian English: /kɑːˈstuːmz/ (kah-STOOMZ). In Australian English: /kˈɒstjuːmz/ (K-osty).

Is "costumes" pronounced differently in American and British English?

Yes. In American English it's pronounced /kɑːˈstuːmz/ (kah-STOOMZ), while in British English it's /kˈɒstjuːmz/ (K-osty).

How to Pronounce "costumes"

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costumes

regional

/kɑːˈstuːmz/

kah-STOOMZ

Syllable Breakdown

kɑːcos·stuːmztumes

Source

90%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14