fibreboard vs Masonite

fibreboard and Masonite both are nouns.

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

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

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

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