Devil vs Satan

Devil and Satan both are nouns.

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

As nouns, Devil and Satan are synonyms defined as:

Devil and Satan: (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, Lucifer, Old Nick, Prince of Darkness, the Tempter.

Devil (noun)	Satan (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