Devil vs Lucifer

Devil and Lucifer both are nouns.

Word	Noun	Adjective	Verb	Adverb
Devil	Yes	No	No	No
Lucifer	Yes	No	No	No

As nouns, Devil and Lucifer are synonyms defined as:

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

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

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