breathalyze vs breathalyse

breathalyze and breathalyse both are verbs.

Word	Noun	Adjective	Verb	Adverb
breathalyze	No	No	Yes	No
breathalyse	No	No	Yes	No

As verbs, breathalyze and breathalyse are synonyms defined as:

breathalyze and breathalyse: test someone's alcohol level in his blood by means of a breathalyzer

breathalyze (verb)	breathalyse (verb)
test someone's alcohol level in his blood by means of a breathalyzer	test someone's alcohol level in his blood by means of a breathalyzer