divan bed vs daybed

divan bed and daybed both are nouns.

Word	Noun	Adjective	Verb	Adverb
divan bed	Yes	No	No	No
daybed	Yes	No	No	No

As nouns, divan bed and daybed are synonyms defined as:

divan bed and daybed: an armless couch; a seat by day and a bed by night

divan bed (noun)	daybed (noun)
an armless couch; a seat by day and a bed by night	a long chair; for reclining
	an armless couch; a seat by day and a bed by night