beaver board vs wallboard

beaver board and wallboard both are nouns.

Word	Noun	Adjective	Verb	Adverb
beaver board	Yes	No	No	No
wallboard	Yes	No	No	No

As nouns, wallboard is a hypernym of beaver board; that is, wallboard is a word with a broader meaning than beaver board:

beaver board: a light wallboard made of compressed wood pulp
wallboard: a wide flat board used to cover walls or partitions; made from plaster or wood pulp or other materials and used primarily to form the interior walls of houses

Other hypernyms of beaver board include dry wall, drywall.

beaver board (noun)	wallboard (noun)
a light wallboard made of compressed wood pulp	a wide flat board used to cover walls or partitions; made from plaster or wood pulp or other materials and used primarily to form the interior walls of houses