linear meter vs linear metre

linear meter and linear metre both are nouns.

Word	Noun	Adjective	Verb	Adverb
linear meter	Yes	No	No	No
linear metre	Yes	No	No	No

As nouns, linear meter and linear metre are synonyms defined as:

linear meter and linear metre: a meter in which the deflection of the pointer is proportional to the quantity measured.

linear meter (noun)	linear metre (noun)
a meter in which the deflection of the pointer is proportional to the quantity measured.	a meter in which the deflection of the pointer is proportional to the quantity measured.