British spelling vs sulphurous

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

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

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

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