British spelling vs tonne-kilometre

British spelling and tonne-kilometre both are nouns.

Word	Noun	Adjective	Verb	Adverb
British spelling	Yes	No	No	No
tonne-kilometre	Yes	No	No	No

British spelling (noun)	tonne-kilometre (noun)
English orthography used in the UK, Ireland and most of the Commonwealth (characterized by 'analyse', 'centre' and 'useable')	a unit of measure used in freight transport which determines the transport of one tonne of goods by a transport mode over one kilometer.