carrier bag vs paper bag

carrier bag and paper bag both are nouns.

Word	Noun	Adjective	Verb	Adverb
carrier bag	Yes	No	No	No
paper bag	Yes	No	No	No

As nouns, carrier bag and paper bag are synonyms defined as:

carrier bag and paper bag: a bag made of paper or plastic for holding customer's purchases

Other synonyms of carrier bag include poke, sack.

carrier bag (noun)	paper bag (noun)
a bag made of paper or plastic for holding customer's purchases	a bag made of paper or plastic for holding customer's purchases