millilitre vs British spelling

millilitre and British spelling both are nouns.

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

millilitre (noun)	British spelling (noun)
a metric unit of volume equal to one thousandth of a liter	English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')