fibrillation vs fibrillate

fibrillation is a noun but fibrillate is not a noun.

Word	Noun	Adjective	Verb	Adverb
fibrillation	Yes	No	No	No
fibrillate	No	No	Yes	No

fibrillation (noun)	fibrillate (noun)
act or process of forming fibrils
muscular twitching involving individual muscle fibers acting without coordination

fibrillation (verb)	fibrillate (verb)
	make fine, irregular, rapid twitching movements