cheater vs deceiver

cheater and deceiver both are nouns.

Word	Noun	Adjective	Verb	Adverb
cheater	Yes	No	No	No
deceiver	Yes	No	No	No

As nouns, cheater and deceiver are synonyms defined as:

cheater and deceiver: someone who leads you to believe something that is not true

Other synonyms of cheater include beguiler, cheat, slicker, trickster.

cheater (noun)	deceiver (noun)
someone who leads you to believe something that is not true	someone who leads you to believe something that is not true