decoy vs deceiver

decoy and deceiver both are nouns.

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

As nouns, deceiver is a hypernym of decoy; that is, deceiver is a word with a broader meaning than decoy:

Other hypernyms of decoy include accomplice, confederate, beguiler, cheat, cheater, slicker, trickster.

decoy (noun)	deceiver (noun)
something used to lure fish or other animals into danger so they can be trapped or killed	someone who leads you to believe something that is not true
a beguiler who leads someone into danger (usually as part of a plot)

decoy (verb)	deceiver (verb)
lure or entrap with or as if with a decoy