glasshouse vs greenhouse

glasshouse and greenhouse both are nouns.

Word	Noun	Adjective	Verb	Adverb
glasshouse	Yes	No	No	No
greenhouse	Yes	Yes	No	No

As nouns, glasshouse and greenhouse are synonyms defined as:

glasshouse and greenhouse: a building with glass walls and roof; for the cultivation and exhibition of plants under controlled conditions

glasshouse (noun)	greenhouse (noun)
a building with glass walls and roof; for the cultivation and exhibition of plants under controlled conditions	a building with glass walls and roof; for the cultivation and exhibition of plants under controlled conditions

glasshouse (adjective)	greenhouse (adjective)
	of or relating to or caused by the greenhouse effect