footman vs manservant

footman and manservant both are nouns.

Word	Noun	Adjective	Verb	Adverb
footman	Yes	No	No	No
manservant	Yes	No	No	No

As nouns, manservant is a hypernym of footman; that is, manservant is a word with a broader meaning than footman:

footman: a man employed as a servant in a large establishment (as a palace) to run errands and do chores
manservant: a man servant

footman (noun)	manservant (noun)
a man employed as a servant in a large establishment (as a palace) to run errands and do chores	a man servant