duffel vs duffel bag

duffel and duffel bag both are nouns.

Word	Noun	Adjective	Verb	Adverb
duffel	Yes	No	No	No
duffel bag	Yes	No	No	No

As nouns, duffel and duffel bag are synonyms defined as:

duffel and duffel bag: a large cylindrical bag of heavy cloth; for carrying personal belongings

Other synonyms of duffel include duffle, duffle bag.

duffel (noun)	duffel bag (noun)
a coarse heavy woolen fabric	a large cylindrical bag of heavy cloth; for carrying personal belongings
a large cylindrical bag of heavy cloth; for carrying personal belongings