flesh out vs set forth

flesh out and set forth both are verbs.

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

As verbs, set forth is a hyponym of flesh out; that is, set forth is a word with a more specific, narrower meaning than flesh out:

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

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