greenhouse vs greenhouse effect

greenhouse and greenhouse effect both are nouns.

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

greenhouse (noun)	greenhouse effect (noun)
a building with glass walls and roof; for the cultivation and exhibition of plants under controlled conditions	warming that results when solar radiation is trapped by the atmosphere; caused by atmospheric gases that allow sunshine to pass through but absorb heat that is radiated back from the warmed surface of the earth

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