daystar vs morning star

daystar and morning star both are nouns.

Word	Noun	Adjective	Verb	Adverb
daystar	Yes	No	No	No
morning star	Yes	No	No	No

As nouns, daystar and morning star are synonyms defined as:

daystar and morning star: a planet (usually Venus) seen just before sunrise in the eastern sky

Other synonyms of daystar include Lucifer, Phosphorus.

daystar (noun)	morning star (noun)
a planet (usually Venus) seen just before sunrise in the eastern sky	a planet (usually Venus) seen just before sunrise in the eastern sky