manor vs mansion house

manor and mansion house both are nouns.

Word	Noun	Adjective	Verb	Adverb
manor	Yes	No	No	No
mansion house	Yes	No	No	No

As nouns, mansion house is a hypernym of manor; that is, mansion house is a word with a broader meaning than manor:

Other hypernyms of manor include hall, manse, mansion, residence.

manor (noun)	mansion house (noun)
the mansion of a lord or wealthy person	a large and imposing house
the landed estate of a lord (including the house on it)