daybed vs chair

daybed and chair both are nouns.

Word	Noun	Adjective	Verb	Adverb
daybed	Yes	No	No	No
chair	Yes	No	Yes	No

As nouns, chair is a hypernym of daybed; that is, chair is a word with a broader meaning than daybed:

daybed (noun)	chair (noun)
a long chair; for reclining	the position of professor
an armless couch; a seat by day and a bed by night	a seat for one person, with a support for the back
	an instrument of execution by electrocution; resembles an ordinary seat for one person
	a particular seat in an orchestra
	the officer who presides at the meetings of an organization

daybed (verb)	chair (verb)
	preside over
	act or preside as chair, as of an academic department in a university