sulphurous vs British spelling

sulphurous is not a noun while British spelling is a noun.

Word	Noun	Adjective	Verb	Adverb
sulphurous	No	Yes	No	No
British spelling	Yes	No	No	No

sulphurous (noun)	British spelling (noun)
	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')

sulphurous (adjective)	British spelling (adjective)
of or related to or containing sulfur or derived from sulfur
characterized by oppressive heat and humidity
harsh or corrosive in tone