Randomised or randomized?
randomised is an adjective meaning “Alternative spelling of randomized”; randomized is an adjective meaning “Obtained by randomization”. Wiktionary gives them as spellings of the same word. In written English (wordfreq, 2021 data) randomized is about 5.8 times as common as randomised.
What is the difference between randomised and randomized?
| randomised | randomized | |
|---|---|---|
| Part of speech | adjective, verb | adjective, verb |
| Meaning | Alternative spelling of randomized | Obtained by randomization |
| Example | none recorded | none recorded |
| Pronunciation | not recorded | not recorded |
| In writing | about once in every 3 million words | 2.2 times per million words |
Sources: randomised and randomized in the English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0); written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Every current meaning of randomised and randomized
randomised
- 1
Alternative spelling of randomized
randomized
- 1
Obtained by randomization
Source: the English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0); obsolete, archaic, dialect and rare senses left out.
Which is more common, randomised or randomized?
randomised appears about once in every 3 million words; randomized 2.2 times per million words.
randomised about once in every 3 million wordsrandomized 2.2 times per million words
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How many people search randomised vs randomized?
“randomised vs randomized” is searched about 70 times a month on Google and 10 on Bing in the United States. Google counts close variants of a query together (“randomized vs randomised”, “randomised or randomized”).
Sources: Google Ads keyword data through DataForSEO and Microsoft Advertising keyword data through DataForSEO, the average month from September 2025 to August 2026.