professional organisation vs British spelling

professional organisation and British spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
professional organisation	Yes	No	No	No
British spelling	Yes	No	No	No

professional organisation (noun)	British spelling (noun)
an organization of and for professional people	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')