ground glass vs glass

ground glass and glass both are nouns.

Word	Noun	Adjective	Verb	Adverb
ground glass	Yes	No	No	No
glass	Yes	No	Yes	No

As nouns, glass is a hypernym of ground glass; that is, glass is a word with a broader meaning than ground glass:

ground glass: glass that diffuses light due to a rough surface produced by abrasion or etching
glass: a brittle transparent solid with irregular atomic structure

As nouns, glass is a hypernym of ground glass; that is, glass is a word with a broader meaning than ground glass:

ground glass (noun)	glass (noun)
glass that diffuses light due to a rough surface produced by abrasion or etching	a container made of glass for holding liquids while drinking
particulate glass made by grinding and used as an abrasive	an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
	a mirror; usually a ladies' dressing mirror
	a small refracting telescope
	glassware collectively
	the quantity a glass will hold
	a brittle transparent solid with irregular atomic structure

ground glass (verb)	glass (verb)
	become glassy or take on a glass-like appearance
	put in a glass container
	enclose with glass
	scan (game in the forest) with binoculars
	furnish with glass