tonne-kilometre vs tkm

tonne-kilometre and tkm both are nouns.

Word	Noun	Adjective	Verb	Adverb
tonne-kilometre	Yes	No	No	No
tkm	Yes	No	No	No

As nouns, tonne-kilometre and tkm are synonyms defined as:

tonne-kilometre and tkm: a unit of measure used in freight transport which determines the transport of one tonne of goods by a transport mode over one kilometer.

Other synonyms of tonne-kilometre include tonne-kilometer.

tonne-kilometre (noun)	tkm (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.	a unit of measure used in freight transport which determines the transport of one tonne of goods by a transport mode over one kilometer.