expatiate vs flesh out

expatiate and flesh out both are verbs.

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

As verbs, expatiate and flesh out are synonyms defined as:

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

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

expatiate (verb)	flesh out (verb)
add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing	become round, plump, or shapely
	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