experience vs reliving

experience and reliving both are nouns.

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

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

Other hyponyms of experience include reality, world, life, living, re-experiencing, reminder.

experience (noun)	reliving (noun)
the content of direct observation or participation in an event	a recurrence of a prior experience
the accumulation of knowledge or skill that results from direct participation in events or activities
an event as apprehended

experience (verb)	reliving (verb)
undergo
have firsthand knowledge of states, situations, emotions, or sensations
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