domestic help vs retainer

domestic help and retainer both are nouns.

Word	Noun	Adjective	Verb	Adverb
domestic help	Yes	No	No	No
retainer	Yes	No	No	No

As nouns, retainer is a hypernym of domestic help; that is, retainer is a word with a broader meaning than domestic help:

domestic help: a servant who is paid to perform menial tasks around the household
retainer: a person working in the service of another (especially in the household)

Other hypernyms of domestic help include servant.

domestic help (noun)	retainer (noun)
a servant who is paid to perform menial tasks around the household	a dental appliance that holds teeth (or a prosthesis) in position after orthodontic treatment
	a person working in the service of another (especially in the household)
	a fee charged in advance to retain the services of someone