blunder out vs speak

blunder out and speak both are verbs.

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

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

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

blunder out (verb)	speak (verb)
utter impulsively	express in speech
	exchange thoughts; talk with
	use language
	give a speech to
	make a characteristic or natural sound