major-domo vs servant

major-domo and servant both are nouns.

Word	Noun	Adjective	Verb	Adverb
major-domo	Yes	No	No	No
servant	Yes	No	No	No

As nouns, servant is a hypernym of major-domo; that is, servant is a word with a broader meaning than major-domo:

major-domo: the chief steward or butler of a great household
servant: a person working in the service of another (especially in the household)

Other hypernyms of major-domo include retainer.

major-domo (noun)	servant (noun)
the chief steward or butler of a great household	a person working in the service of another (especially in the household)
	in a subordinate position