How do you pronounce "thermonuclear"?

In American English: /ˌθɝːmoʊˈnuːkliːɝ/ (thurm-oh-NOOKL-ee-ur). In British English: /θˈɜːmənjˌuːkliə/ (TH-ɜm-uhny-ookl-ee). In Canadian English: /ˌθɝːmoʊˈnuːkliːɝ/ (thurm-oh-NOOKL-ee-ur). In Australian English: /θˈɜːmənjˌuːkliə/ (TH-ɜm-uhny-ookl-ee).

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

Yes. In American English it's pronounced /ˌθɝːmoʊˈnuːkliːɝ/ (thurm-oh-NOOKL-ee-ur), while in British English it's /θˈɜːmənjˌuːkliə/ (TH-ɜm-uhny-ookl-ee).

How to Pronounce "thermonuclear"

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thermonuclear

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/ˌθɝːmoʊˈnuːkliːɝ/

thurm-oh-NOOKL-ee-ur

Syllable Breakdown

θɝːmth·oʊer·nuːklmonu·iːcle·ɝar

Source

80%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14