give away vs tell on

give away and tell on both are verbs.

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

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

Other synonyms of give away include betray, denounce, grass, rat, shit, shop, snitch, stag.

give away (verb)	tell on (verb)
make known to the public information that was previously known only to a few people or that was meant to be kept a secret	produce an effect or strain on somebody
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