criminalize vs illegalise

criminalize and illegalise both are verbs.

Word	Noun	Adjective	Verb	Adverb
criminalize	No	No	Yes	No
illegalise	No	No	Yes	No

As verbs, criminalize and illegalise are synonyms defined as:

Other synonyms of criminalize include criminalise, illegalize, outlaw.

criminalize (verb)	illegalise (verb)
declare illegal; outlaw	declare illegal; outlaw
treat as a criminal