illegalize vs criminalise

illegalize and criminalise both are verbs.

Word	Noun	Adjective	Verb	Adverb
illegalize	No	No	Yes	No
criminalise	No	No	Yes	No

As verbs, illegalize and criminalise are synonyms defined as:

Other synonyms of illegalize include criminalize, illegalise, outlaw.

illegalize (verb)	criminalise (verb)
declare illegal; outlaw	declare illegal; outlaw