gaseous vs vapourous

gaseous and vapourous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
gaseous	No	Yes	No	No
vapourous	No	Yes	No	No

gaseous (adjective)	vapourous (adjective)
existing as or having characteristics of a gas	filled with vapor
	resembling or characteristic of vapor
	so thin as to transmit light