How do you pronounce "castor"?

In American English: /ˈkæstɝ/ (KAST-ur). In British English: /kˈastə/ (K). In Canadian English: /ˈkæstɝ/ (KAST-ur). In Australian English: /kˈastə/ (K).

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

Yes. In American English it's pronounced /ˈkæstɝ/ (KAST-ur), while in British English it's /kˈastə/ (K).

How to Pronounce "castor"

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castor

regional

/ˈkæstɝ/

KAST-ur

Syllable Breakdown

kæstcas·ɝtor

Source

80%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14