portmanteau vs traveling bag

portmanteau and traveling bag both are nouns.

Word	Noun	Adjective	Verb	Adverb
portmanteau	Yes	No	No	No
traveling bag	Yes	No	No	No

As nouns, traveling bag is a hypernym of portmanteau; that is, traveling bag is a word with a broader meaning than portmanteau:

Other hypernyms of portmanteau include bag, grip, suitcase, travelling bag.

portmanteau (noun)	traveling bag (noun)
a large travelling bag made of stiff leather	a portable rectangular container for carrying clothes
a new word formed by joining two others and combining their meanings