phrenologist vs craniologist

phrenologist and craniologist both are nouns.

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

As nouns, phrenologist and craniologist are synonyms defined as:

phrenologist and craniologist: someone who claims to be able to read your character from the shape of your skull

phrenologist (noun)	craniologist (noun)
someone who claims to be able to read your character from the shape of your skull	someone who claims to be able to read your character from the shape of your skull