mansion vs planetary house

mansion and planetary house both are nouns.

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

As nouns, mansion and planetary house are synonyms defined as:

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

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

mansion (noun)	planetary house (noun)
a large and imposing house	(astrology) one of 12 equal areas into which the zodiac is divided
(astrology) one of 12 equal areas into which the zodiac is divided