floorboard vs flooring

floorboard and flooring both are nouns.

Word	Noun	Adjective	Verb	Adverb
floorboard	Yes	No	No	No
flooring	Yes	No	No	No

As nouns, flooring is a hypernym of floorboard; that is, flooring is a word with a broader meaning than floorboard:

floorboard: the floor of an automobile
flooring: the inside lower horizontal surface (as of a room, hallway, tent, or other structure)

Other hypernyms of floorboard include floor.

floorboard (noun)	flooring (noun)
a board in the floor	the inside lower horizontal surface (as of a room, hallway, tent, or other structure)
the floor of an automobile	building material used in laying floors