experience vs witness

experience and witness both are nouns.

Word	Noun	Adjective	Verb	Adverb
experience	Yes	No	Yes	No
witness	Yes	No	Yes	No

As verbs, witness is a hyponym of experience; that is, witness is a word with a more specific, narrower meaning than experience:

Other hyponyms of experience include experience, know, live, endure, suffer, meet, suffer, feel, enjoy, find, see, come.

experience (noun)	witness (noun)
the content of direct observation or participation in an event	testimony by word or deed to your religious faith
the accumulation of knowledge or skill that results from direct participation in events or activities	someone who sees an event and reports what happened
an event as apprehended	a close observer; someone who looks at something (such as an exhibition of some kind)
	(law) a person who attests to the genuineness of a document or signature by adding their own signature
	(law) a person who testifies under oath in a court of law

experience (verb)	witness (verb)
undergo	be a witness to
have firsthand knowledge of states, situations, emotions, or sensations	perceive or be contemporaneous with
undergo an emotional sensation or be in a particular state of mind
go through (mental or physical states or experiences)
undergo or live through a difficult experience