How do you pronounce "phosphorus"?

In American English: /ˈfɑːsfɝəs/ (FAHSF-ur-uhs). In British English: /fˈɒsfɔːɹəs/ (F-osf-awr). In Canadian English: /ˈfɑːsfɝəs/ (FAHSF-ur-uhs). In Australian English: /fˈɒsfɔːɹəs/ (F-osf-awr).

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

Yes. In American English it's pronounced /ˈfɑːsfɝəs/ (FAHSF-ur-uhs), while in British English it's /fˈɒsfɔːɹəs/ (F-osf-awr).

How to Pronounce "phosphorus"

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phosphorus

regional

/ˈfɑːsfɝəs/

FAHSF-ur-uhs

Syllable Breakdown

fɑːsfphos·ɝpho·əsrus

Source

80%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14