bedchamber vs bedroom

bedchamber and bedroom both are nouns.

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

As nouns, bedchamber and bedroom are synonyms defined as:

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

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