maid vs chambermaid

maid and chambermaid both are nouns.

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

As nouns, chambermaid is a hyponym of maid; that is, chambermaid is a word with a more specific, narrower meaning than maid:

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

Other hyponyms of maid include fille de chambre, handmaid, handmaiden, lady's maid, parlormaid, parlourmaid.

maid (noun)	chambermaid (noun)
an unmarried girl (especially a virgin)	a maid who is employed to clean and care for bedrooms (now primarily in hotels)
a female domestic