blab vs give away

blab and give away both are verbs.

Word	Noun	Adjective	Verb	Adverb
blab	No	No	Yes	No
give away	No	No	Yes	No

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

blab: divulge confidential information or secrets
give away: make known to the public information that was previously known only to a few people or that was meant to be kept a secret

Other hypernyms of blab include break, bring out, disclose, discover, divulge, expose, let on, let out, reveal, uncover, unwrap.

blab (verb)	give away (verb)
divulge confidential information or secrets	make known to the public information that was previously known only to a few people or that was meant to be kept a secret
speak (about unimportant matters) rapidly and incessantly	give away information about somebody
	make a gift of
	formally hand over to the bridegroom in marriage; of a bride by her father