How do you pronounce "thermos"?

In American English: /ˈθɝːməs/ (THURM-uhs). In British English: /θˈɜːməs/ (TH-ɜm). In Canadian English: /ˈθɝːməs/ (THURM-uhs). In Australian English: /θˈɜːməs/ (TH-ɜm).

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

Yes. In American English it's pronounced /ˈθɝːməs/ (THURM-uhs), while in British English it's /θˈɜːməs/ (TH-ɜm).

How to Pronounce "thermos"

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thermos

regional

/ˈθɝːməs/

THURM-uhs

Syllable Breakdown

θɝːmther·əsmos

Source

80%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14