sing vs verbalize

sing and verbalize both are verbs.

Word	Noun	Adjective	Verb	Adverb
sing	No	No	Yes	No
verbalize	No	No	Yes	No

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

Other hypernyms of sing include mouth, speak, talk, utter, verbalise.

sing (verb)	verbalize (verb)
make a whining, ringing, or whistling sound	convert into a verb
divulge confidential information or secrets	express in speech
to make melodious sounds	be verbose
produce tones with the voice	articulate; either verbally or with a cry, shout, or noise
deliver by singing