Lucifer vs morning star

Lucifer and morning star both are nouns.

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

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

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

Other synonyms of Lucifer include daystar, Phosphorus.

Lucifer (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
(Judeo-Christian and Islamic religions) chief spirit of evil and adversary of God; tempter of mankind; master of Hell