Noun and の adjective
びょうしょう
彼は病床に臥してついにまた起ちません。
He laid down on his sickbed, never to rise again.
A sick bed is a sickbed. If you're in that bed, you're probably sick.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.