Masonite vs fiberboard

Masonite and fiberboard both are nouns.

Word	Noun	Adjective	Verb	Adverb
Masonite	Yes	No	No	No
fiberboard	Yes	No	No	No

As nouns, fiberboard is a hypernym of Masonite; that is, fiberboard is a word with a broader meaning than Masonite:

Masonite: a type of fiberboard
fiberboard: wallboard composed of wood chips or shavings bonded together with resin and compressed into rigid sheets

Other hypernyms of Masonite include fibreboard, particle board.

Masonite (noun)	fiberboard (noun)
a type of fiberboard	wallboard composed of wood chips or shavings bonded together with resin and compressed into rigid sheets