hew vs roughcast

hew is not a noun while roughcast is a noun.

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

As verbs, roughcast is a hyponym of hew; that is, roughcast is a word with a more specific, narrower meaning than hew:

Other hyponyms of hew include rough-hew.

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

hew (verb)	roughcast (verb)
strike with an axe; cut down, strike	hew roughly, without finishing the surface
make or shape as with an axe	apply roughcast to
	shape roughly