bedroom vs bedchamber

bedroom and bedchamber both are nouns.

Word	Noun	Adjective	Verb	Adverb
bedroom	Yes	No	No	No
bedchamber	Yes	No	No	No

As nouns, bedroom and bedchamber are synonyms defined as:

Other synonyms of bedroom include chamber, sleeping accommodation, sleeping room.

bedroom (noun)	bedchamber (noun)
a room used primarily for sleeping	a room used primarily for sleeping