blunder out vs verbalise

blunder out and verbalise both are verbs.

Word	Noun	Adjective	Verb	Adverb
blunder out	No	No	Yes	No
verbalise	No	No	Yes	No

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

Other hypernyms of blunder out include mouth, speak, talk, utter, verbalize.

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