triple-decker vs club sandwich

triple-decker and club sandwich both are nouns.

Word	Noun	Adjective	Verb	Adverb
triple-decker	Yes	No	No	No
club sandwich	Yes	No	No	No

As nouns, triple-decker and club sandwich are synonyms defined as:

triple-decker and club sandwich: made with three slices of usually toasted bread

Other synonyms of triple-decker include three-decker.

triple-decker (noun)	club sandwich (noun)
made with three slices of usually toasted bread	made with three slices of usually toasted bread