encyclopaedia vs British spelling

encyclopaedia and British spelling both are nouns.

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

encyclopaedia (noun)	British spelling (noun)
a reference work (often in several volumes) containing articles on various topics (often arranged in alphabetical order) dealing with the entire range of human knowledge or with some particular specialty	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')