vaporific vs vapourous

vaporific and vapourous both are adjectives.

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

As adjectives, vaporific and vapourous are synonyms defined as:

Other synonyms of vaporific include vaporish, vaporous, vapourific, vapourish.

vaporific (adjective)	vapourous (adjective)
resembling or characteristic of vapor	filled with vapor
(used of substances) capable of being volatilized	resembling or characteristic of vapor
	so thin as to transmit light