How do you pronounce "syntheses"?

In American English: /ˈsɪnθəˌsiːs/ (SINTH-uh-sees). In British English: /sˈɪnθɪsiːz/ (S-inth-is). In Canadian English: /ˈsɪnθəˌsiːs/ (SINTH-uh-sees). In Australian English: /sˈɪnθəsˌiːz/ (S-inth-uhs).

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

Yes. In American English it's pronounced /ˈsɪnθəˌsiːs/ (SINTH-uh-sees), while in British English it's /sˈɪnθɪsiːz/ (S-inth-is).

How to Pronounce "syntheses"

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syntheses

regional

/ˈsɪnθəˌsiːs/

SINTH-uh-sees

Syllable Breakdown

sɪnθsyn·əthe·siːsses

Source

90%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14