boudoir vs bedchamber

boudoir and bedchamber both are nouns.

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

As nouns, bedchamber is a hypernym of boudoir; that is, bedchamber is a word with a broader meaning than boudoir:

Other hypernyms of boudoir include bedroom, chamber, sleeping accommodation, sleeping room.

boudoir (noun)	bedchamber (noun)
a lady's bedroom or private sitting room	a room used primarily for sleeping