prattle vs speak

prattle is a noun but speak is not a noun.

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

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

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

prattle (noun)	speak (noun)
idle or foolish and irrelevant talk

prattle (verb)	speak (verb)
speak (about unimportant matters) rapidly and incessantly	express in speech
	exchange thoughts; talk with
	use language
	give a speech to
	make a characteristic or natural sound