star sign vs planetary house

star sign and planetary house both are nouns.

Word	Noun	Adjective	Verb	Adverb
star sign	Yes	No	No	No
planetary house	Yes	No	No	No

As nouns, star sign and planetary house are synonyms defined as:

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

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

star sign (noun)	planetary house (noun)
(astrology) one of 12 equal areas into which the zodiac is divided	(astrology) one of 12 equal areas into which the zodiac is divided