square centimetre vs British spelling

square centimetre and British spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
square centimetre	Yes	No	No	No
British spelling	Yes	No	No	No

square centimetre (noun)	British spelling (noun)
a unit of area measurement equivalent to 1 centimeter in length multiplied by 1 centimeter in width, where one centimeter equals 0.3937 inch.	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')