bumble vs speak

bumble and speak both are verbs.

Word	Noun	Adjective	Verb	Adverb
bumble	No	No	Yes	No
speak	No	No	Yes	No

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

Other hypernyms of bumble include mouth, talk, utter, verbalise, verbalize.

bumble (verb)	speak (verb)
speak haltingly	express in speech
walk unsteadily, tripping repeatedly	exchange thoughts; talk with
make a mess of, destroy or ruin	use language
	give a speech to
	make a characteristic or natural sound