house servant vs amah

house servant and amah both are nouns.

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

As nouns, amah is a hyponym of house servant; that is, amah is a word with a more specific, narrower meaning than house servant:

house servant: a servant who is paid to perform menial tasks around the household
amah: a female domestic

Other hyponyms of house servant include ayah, home help, housekeeper, housemaid, maid, maidservant, skivvy, slavey.

house servant (noun)	amah (noun)
a servant who is paid to perform menial tasks around the household	a female domestic
	a woman hired to suckle a child of someone else