chambermaid vs maidservant

chambermaid and maidservant both are nouns.

Word	Noun	Adjective	Verb	Adverb
chambermaid	Yes	No	No	No
maidservant	Yes	No	No	No

As nouns, maidservant is a hypernym of chambermaid; that is, maidservant is a word with a broader meaning than chambermaid:

chambermaid: a maid who is employed to clean and care for bedrooms (now primarily in hotels)
maidservant: a female domestic

Other hypernyms of chambermaid include amah, housemaid, maid.

chambermaid (noun)	maidservant (noun)
a maid who is employed to clean and care for bedrooms (now primarily in hotels)	a female domestic