feed vs flesh out

feed is a noun but flesh out is not a noun.

Word	Noun	Adjective	Verb	Adverb
feed	Yes	No	Yes	No
flesh out	No	No	Yes	No

feed (noun)	flesh out (noun)
food for domestic livestock

feed (verb)	flesh out (verb)
provide with fertilizers or add nutrients to	become round, plump, or shapely
introduce continuously	add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing
take in food; used of animals only	make fat or plump
give food to
serve as food for; be the food for
feed into; supply
provide as food
gratify
profit from in an exploitatory manner
move along, of liquids
support or promote