harangue vs speak

harangue is a noun but speak is not a noun.

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

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

Other hypernyms of harangue include address.

harangue (noun)	speak (noun)
a loud bombastic declamation expressed with strong emotion

harangue (verb)	speak (verb)
deliver a harangue to; address forcefully	express in speech
	exchange thoughts; talk with
	use language
	give a speech to
	make a characteristic or natural sound