let go vs relinquish

let go and relinquish both are verbs.

Word	Noun	Adjective	Verb	Adverb
let go	No	No	Yes	No
relinquish	No	No	Yes	No

As verbs, let go and relinquish are synonyms defined as:

Other synonyms of let go include let go of, release.

let go (verb)	relinquish (verb)
release, as from one's grip	release, as from one's grip
be relaxed	turn away from; give up
	part with a possession or right
	do without or cease to hold or adhere to