paper route vs paper round

paper route and paper round both are nouns.

Word	Noun	Adjective	Verb	Adverb
paper route	Yes	No	No	No
paper round	Yes	No	No	No

As nouns, paper route and paper round are synonyms defined as:

paper route and paper round: the route taken when delivering newspapers every day

paper route (noun)	paper round (noun)
the job of delivering newspapers regularly	the route taken when delivering newspapers every day
the route taken when delivering newspapers every day