mountebank vs deceiver

mountebank and deceiver both are nouns.

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

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

mountebank: a flamboyant deceiver; one who attracts customers with tricks or jokes
deceiver: someone who leads you to believe something that is not true

Other hypernyms of mountebank include beguiler, cheat, cheater, slicker, trickster.

mountebank (noun)	deceiver (noun)
a flamboyant deceiver; one who attracts customers with tricks or jokes	someone who leads you to believe something that is not true