supply line vs supply route

supply line and supply route both are nouns.

Word	Noun	Adjective	Verb	Adverb
supply line	Yes	No	No	No
supply route	Yes	No	No	No

As nouns, supply line and supply route are synonyms defined as:

supply line and supply route: a route over which supplies can be delivered

supply line (noun)	supply route (noun)
a route over which supplies can be delivered	a route over which supplies can be delivered