seneschal vs retainer

seneschal and retainer both are nouns.

Word	Noun	Adjective	Verb	Adverb
seneschal	Yes	No	No	No
retainer	Yes	No	No	No

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

seneschal: the chief steward or butler of a great household
retainer: a person working in the service of another (especially in the household)

Other hypernyms of seneschal include servant.

seneschal (noun)	retainer (noun)
the chief steward or butler of a great 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