fiberboard vs Masonite

fiberboard and Masonite both are nouns.

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

As nouns, Masonite is a hyponym of fiberboard; that is, Masonite is a word with a more specific, narrower meaning than fiberboard:

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

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