improvement vs improve

improvement is a noun but improve is not a noun.

Word	Noun	Adjective	Verb	Adverb
improvement	Yes	No	No	No
improve	No	No	Yes	No

improvement (noun)	improve (noun)
the act of improving something
a change for the better; progress in development
a condition superior to an earlier condition

improvement (verb)	improve (verb)
	get better
	to make better