four-flusher vs deceiver

four-flusher and deceiver both are nouns.

Word	Noun	Adjective	Verb	Adverb
four-flusher	Yes	No	No	No
deceiver	Yes	No	No	No

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

Other hypernyms of four-flusher include beguiler, cheat, cheater, slicker, trickster.

four-flusher (noun)	deceiver (noun)
a person who tries to bluff other people	someone who leads you to believe something that is not true