miasmal vs vapourous

miasmal and vapourous both are adjectives.

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

As adjectives, miasmal and vapourous are synonyms defined as:

Other synonyms of miasmal include miasmic, vaporous.

miasmal (adjective)	vapourous (adjective)
filled with vapor	filled with vapor
	resembling or characteristic of vapor
	so thin as to transmit light