sign of the zodiac vs mansion

sign of the zodiac and mansion both are nouns.

Word	Noun	Adjective	Verb	Adverb
sign of the zodiac	Yes	No	No	No
mansion	Yes	No	No	No

As nouns, sign of the zodiac and mansion are synonyms defined as:

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

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

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