eye colour vs British spelling

eye colour and British spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
eye colour	Yes	No	No	No
British spelling	Yes	No	No	No

eye colour (noun)	British spelling (noun)
The pigmentation of the eye's iris.	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')