mansion vs house

mansion and house both are nouns.

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

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

As nouns, mansion and house are synonyms defined as:

mansion and house: (astrology) one of 12 equal areas into which the zodiac is divided

Other synonyms of mansion include planetary house, sign, sign of the zodiac, star sign.

mansion (noun)	house (noun)
a large and imposing house	play in which children take the roles of father or mother or children and pretend to interact like adults
(astrology) one of 12 equal areas into which the zodiac is divided	a dwelling that serves as living quarters for one or more families
	a building in which something is sheltered or located
	a building where theatrical performances or motion-picture shows can be presented
	aristocratic family line
	the members of a business organization that owns or operates one or more establishments
	an official assembly having legislative powers
	the audience gathered together in a theatre or cinema
	the members of a religious community living together
	a social unit living together
	the management of a gambling house or casino
	(astrology) one of 12 equal areas into which the zodiac is divided

mansion (verb)	house (verb)
	provide someone with accomodation
	contain or cover