flesh out vs modify

flesh out and modify both are verbs.

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

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

Other hypernyms of flesh out include alter, change.

flesh out (verb)	modify (verb)
become round, plump, or shapely	make less severe or harsh or extreme
add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing	add a modifier to a constituent
make fat or plump	cause to change; make different; cause a transformation