Lucifer vs Prince of Darkness

Lucifer and Prince of Darkness both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lucifer	Yes	No	No	No
Prince of Darkness	Yes	No	No	No

As nouns, Lucifer and Prince of Darkness are synonyms defined as:

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

Other synonyms of Lucifer include Beelzebub, Devil, Old Nick, Satan, the Tempter.

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