promenade deck vs hurricane roof

promenade deck and hurricane roof both are nouns.

Word	Noun	Adjective	Verb	Adverb
promenade deck	Yes	No	No	No
hurricane roof	Yes	No	No	No

As nouns, promenade deck and hurricane roof are synonyms defined as:

promenade deck and hurricane roof: a deck at the top of a passenger ship

Other synonyms of promenade deck include awning deck, hurricane deck.

promenade deck (noun)	hurricane roof (noun)
a deck at the top of a passenger ship	a deck at the top of a passenger ship