suitcase vs travelling bag

suitcase and travelling bag both are nouns.

Word	Noun	Adjective	Verb	Adverb
suitcase	Yes	No	No	No
travelling bag	Yes	No	No	No

As nouns, suitcase and travelling bag are synonyms defined as:

suitcase and travelling bag: a portable rectangular container for carrying clothes

Other synonyms of suitcase include bag, grip, traveling bag.

suitcase (noun)	travelling bag (noun)
a portable rectangular container for carrying clothes	a portable rectangular container for carrying clothes