assurance vs assure

assurance is a noun but assure is not a noun.

Word	Noun	Adjective	Verb	Adverb
assurance	Yes	No	No	No
assure	No	No	Yes	No

assurance (noun)	assure (noun)
freedom from doubt; belief in yourself and your abilities
a statement intended to inspire confidence
a binding commitment to do or give or refrain from something
a British term for some kinds of insurance

assurance (verb)	assure (verb)
	be careful or certain to do something; make certain of something
	inform positively and with certainty and confidence
	assure somebody of the truth of something with the intention of giving the listener confidence
	make a promise or commitment
	make certain of