dissertate vs speak

dissertate and speak both are verbs.

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

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

Other hypernyms of dissertate include talk.

dissertate (verb)	speak (verb)
talk at length and formally about a topic	express in speech
	exchange thoughts; talk with
	use language
	give a speech to
	make a characteristic or natural sound