tell on vs give away

tell on and give away both are verbs.

Word	Noun	Adjective	Verb	Adverb
tell on	No	No	Yes	No
give away	No	No	Yes	No

As verbs, tell on and give away are synonyms defined as:

Other synonyms of tell on include betray, denounce, grass, rat, shit, shop, snitch, stag.

tell on (verb)	give away (verb)
produce an effect or strain on somebody	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	give away information about somebody
	make a gift of
	formally hand over to the bridegroom in marriage; of a bride by her father