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PlainSpell

synthesise

verb

synthesise is a verb meaning “Non-Oxford British English standard spelling of synthesize” (English Wiktionary, September 2026). It is spelled S-Y-N-T-H-E-S-I-S-E, and it appears about once in every 8 million words in written English (wordfreq, 2021 data).

What does synthesise mean?

verb

  1. 1

    UKNon-Oxford British English standard spelling of synthesize.

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

Forms of synthesise

  • synthesises present, singular, he/she/it
  • synthesising participle, present
  • synthesised participle, past

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

How common is synthesise?

Synthesise appears about once in every 8 million words in written English, the 85,266th most frequent word form in the list.

Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).