roughcast vs plaster

roughcast and plaster both are nouns.

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

As nouns, plaster is a hypernym of roughcast; that is, plaster is a word with a broader meaning than roughcast:

roughcast: a coarse plaster for the surface of external walls
plaster: a mixture of lime or gypsum with sand and water; hardens into a smooth solid; used to cover walls and ceilings

As verbs, plaster is a hypernym of roughcast; that is, plaster is a word with a broader meaning than roughcast:

Other hypernyms of roughcast include daub.

roughcast (noun)	plaster (noun)
a rough preliminary model	adhesive tape used in dressing wounds
a coarse plaster for the surface of external walls	a surface of hardened plaster (as on a wall or ceiling)
	a medical dressing consisting of a soft heated mass of meal or clay that is spread on a cloth and applied to the skin to treat inflamed areas or improve circulation etc.
	a mixture of lime or gypsum with sand and water; hardens into a smooth solid; used to cover walls and ceilings
	any of several gypsum cements; a white powder (a form of calcium sulphate) that forms a paste when mixed with water and hardens into a solid; used in making molds and sculptures and casts for broken limbs

roughcast (verb)	plaster (verb)
hew roughly, without finishing the surface	dress by covering with a therapeutic substance
apply roughcast to	coat with plaster
shape roughly	apply a heavy coat to
	apply a plaster cast to
	affix conspicuously
	cover conspicuously or thickly, as by pasting something on