blurt out vs verbalize

blurt out and verbalize both are verbs.

Word	Noun	Adjective	Verb	Adverb
blurt out	No	No	Yes	No
verbalize	No	No	Yes	No

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

Other hypernyms of blurt out include mouth, speak, talk, utter, verbalise.

blurt out (verb)	verbalize (verb)
utter impulsively	convert into a verb
	express in speech
	be verbose
	articulate; either verbally or with a cry, shout, or noise