rough-hew vs roughcast

rough-hew is not a noun while roughcast is a noun.

Word	Noun	Adjective	Verb	Adverb
rough-hew	No	No	Yes	No
roughcast	Yes	No	Yes	No

As verbs, rough-hew and roughcast are synonyms defined as:

rough-hew (noun)	roughcast (noun)
	a rough preliminary model
	a coarse plaster for the surface of external walls

rough-hew (verb)	roughcast (verb)
hew roughly, without finishing the surface	hew roughly, without finishing the surface
	apply roughcast to
	shape roughly