sell someone out vs give away

sell someone out and give away both are verbs.

Word	Noun	Adjective	Verb	Adverb
sell someone out	No	No	Yes	No
give away	No	No	Yes	No

As verbs, give away is a hypernym of sell someone out; that is, give away is a word with a broader meaning than sell someone out:

Other hypernyms of sell someone out include betray, denounce, grass, rat, shit, shop, snitch, stag, tell on.

sell someone out (verb)	give away (verb)
give information that compromises others	make known to the public information that was previously known only to a few people or that was meant to be kept a secret
	give away information about somebody
	make a gift of
	formally hand over to the bridegroom in marriage; of a bride by her father