drywall vs beaver board

drywall and beaver board both are nouns.

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

As nouns, beaver board is a hyponym of drywall; that is, beaver board is a word with a more specific, narrower meaning than drywall:

drywall: 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
beaver board: a light wallboard made of compressed wood pulp

Other hyponyms of drywall include fiberboard, fibreboard, particle board, gypsum board, plasterboard.

drywall (noun)	beaver board (noun)
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	a light wallboard made of compressed wood pulp