Specialise or specialize?
In American English write specialize; in British and Commonwealth English, specialise. specialise is a verb meaning “Non-Oxford British English standard spelling of specialize”; specialize is a verb meaning “To narrow in scope”. In written English (wordfreq, 2021 data) specialize is about 2.8 times as common as specialise.
What is the difference between specialise and specialize?
| specialise | specialize | |
|---|---|---|
| Part of speech | verb | verb |
| Meaning | BritishUSTo narrow in scope BritishUSTo make distinct or separate due to form or function | |
| Example | none recorded | none recorded |
| Forms | specialises, specialising, specialised | specializes, specializing, specialized |
| Pronunciation | not recorded | /ˈspɛʃəˌlaɪz/ |
| Region | UK | UK, US |
| In writing | about once in every 1 million words | 1.9 times per million words |
Sources: specialise and specialize 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 specialise and specialize
specialize
- 1
BritishUSTo narrow in scope
- 2
BritishUSTo make distinct or separate due to form or function
- 3
BritishUSTo become distinct or separate from what is common, particularly
- 4
BritishUSTo focus one's study upon a particular skill, field, topic, or genre
- 5
BritishUSTo focus one's business upon a particular item or service
- 6
BritishUSderogatoryTo be known or notorious for some specialty
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, specialise or specialize?
specialise appears about once in every 1 million words; specialize 1.9 times per million words.
specialise about once in every 1 million wordsspecialize 1.9 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 specialise vs specialize?
“specialise vs specialize” is searched about 10 times a month on Google (Bing reports no separate figure) in the United States. Google counts close variants of a query together (“specialize vs specialise”, “specialise or specialize”).
Sources: Google Ads keyword data through DataForSEO and Microsoft Advertising keyword data through DataForSEO, the average month from September 2025 to August 2026.