phrenologist vs charlatan

phrenologist and charlatan both are nouns.

Word	Noun	Adjective	Verb	Adverb
phrenologist	Yes	No	No	No
charlatan	Yes	No	No	No

As nouns, charlatan is a hypernym of phrenologist; that is, charlatan is a word with a broader meaning than phrenologist:

phrenologist: someone who claims to be able to read your character from the shape of your skull
charlatan: a flamboyant deceiver; one who attracts customers with tricks or jokes

Other hypernyms of phrenologist include mountebank.

phrenologist (noun)	charlatan (noun)
someone who claims to be able to read your character from the shape of your skull	a flamboyant deceiver; one who attracts customers with tricks or jokes