expound vs expand

expound and expand both are verbs.

Word	Noun	Adjective	Verb	Adverb
expound	No	No	Yes	No
expand	No	No	Yes	No

As verbs, expound and expand are synonyms defined as:

expound and expand: add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing

Other synonyms of expound include dilate, elaborate, enlarge, expatiate, exposit, flesh out, lucubrate.

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

expound: state
expand: add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing

Other hypernyms of expound include dilate, elaborate, enlarge, expatiate, exposit, expound, flesh out, lucubrate.

expound (verb)	expand (verb)
add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing	grow vigorously
state	exaggerate or make bigger
	become larger in size or volume or quantity
	expand the influence of
	make bigger or wider in size, volume, or quantity
	add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing
	extend in one or more directions