expound vs clear up

expound and clear up both are verbs.

Word	Noun	Adjective	Verb	Adverb
expound	No	No	Yes	No
clear up	No	No	Yes	No

As verbs, clear up is a hypernym of expound; that is, clear up is a word with a broader meaning than expound:

expound: add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing
clear up: make clear and (more) comprehensible

Other hypernyms of expound include clarify, elucidate.

expound (verb)	clear up (verb)
add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing	free (the throat) by making a rasping sound
state	finish a task completely
	make free from confusion or ambiguity; make clear
	make clear and (more) comprehensible
	become clear