sing vs give away

sing and give away both are verbs.

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

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

sing: 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 sing include break, bring out, disclose, discover, divulge, expose, let on, let out, reveal, uncover, unwrap.

sing (verb)	give away (verb)
make a whining, ringing, or whistling sound	make known to the public information that was previously known only to a few people or that was meant to be kept a secret
divulge confidential information or secrets	give away information about somebody
to make melodious sounds	make a gift of
produce tones with the voice	formally hand over to the bridegroom in marriage; of a bride by her father
deliver by singing