flooring vs bell deck

flooring and bell deck both are nouns.

Word	Noun	Adjective	Verb	Adverb
flooring	Yes	No	No	No
bell deck	Yes	No	No	No

As nouns, bell deck is a hyponym of flooring; that is, bell deck is a word with a more specific, narrower meaning than flooring:

flooring: the inside lower horizontal surface (as of a room, hallway, tent, or other structure)
bell deck: a floor under the bells of an open belfry

Other hyponyms of flooring include dance floor, floorboard, parquet, parquet floor, truck bed.

flooring (noun)	bell deck (noun)
the inside lower horizontal surface (as of a room, hallway, tent, or other structure)	a floor under the bells of an open belfry
building material used in laying floors