housekeeper vs house servant

housekeeper and house servant both are nouns.

Word	Noun	Adjective	Verb	Adverb
housekeeper	Yes	No	No	No
house servant	Yes	No	No	No

As nouns, house servant is a hypernym of housekeeper; that is, house servant is a word with a broader meaning than housekeeper:

housekeeper: a servant who is employed to perform domestic task in a household
house servant: a servant who is paid to perform menial tasks around the household

Other hypernyms of housekeeper include domestic, domestic help.

housekeeper (noun)	house servant (noun)
a servant who is employed to perform domestic task in a household	a servant who is paid to perform menial tasks around the household