user vs use

user and use both are nouns.

Word	Noun	Adjective	Verb	Adverb
user	Yes	No	No	No
use	Yes	No	Yes	No

user (noun)	use (noun)
a person who makes use of a thing; someone who uses or employs something	the act of using
a person who uses something or someone selfishly or unethically	(psychology) an automatic pattern of behavior in reaction to a specific situation; may be inherited or acquired through frequent repetition
a person who takes drugs	exerting shrewd or devious influence especially for one's own advantage
	what something is used for
	a particular service
	(law) the exercise of the legal right to enjoy the benefits of owning property
	(economics) the utilization of economic goods to satisfy needs or in manufacturing

user (verb)	use (verb)
	put into service; make work or employ for a particular purpose or for its inherent or natural purpose
	take or consume (regularly or habitually)
	use up (resources or materials)
	habitually do something or be in a certain state or place (use only in the past tense)
	avail oneself to
	seek or achieve an end by using to one's advantage