set forth vs flesh out

set forth and flesh out both are verbs.

Word	Noun	Adjective	Verb	Adverb
set forth	No	No	Yes	No
flesh out	No	No	Yes	No

As verbs, flesh out is a hypernym of set forth; that is, flesh out is a word with a broader meaning than set forth:

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

Other hypernyms of set forth include dilate, elaborate, enlarge, expand, expatiate, exposit, expound, lucubrate.

set forth (verb)	flesh out (verb)
state	become round, plump, or shapely
depart for someplace	add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing
	make fat or plump