tonne-kilometre vs Canadian spelling

tonne-kilometre and Canadian spelling both are nouns.

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

tonne-kilometre (noun)	Canadian spelling (noun)
a unit of measure used in freight transport which determines the transport of one tonne of goods by a transport mode over one kilometer.	English orthography used in Canada (characterized by 'analyze', 'centre', 'useable')