Prince of Darkness vs Old Nick

Prince of Darkness and Old Nick both are nouns.

Word	Noun	Adjective	Verb	Adverb
Prince of Darkness	Yes	No	No	No
Old Nick	Yes	No	No	No

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

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

Other synonyms of Prince of Darkness include Beelzebub, Devil, Lucifer, Satan, the Tempter.

Prince of Darkness (noun)	Old Nick (noun)
(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