vapourous vs vaporific

vapourous and vaporific both are adjectives.

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

As adjectives, vapourous and vaporific are synonyms defined as:

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

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