craniologist vs phrenologist

craniologist and phrenologist both are nouns.

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

As nouns, craniologist and phrenologist are synonyms defined as:

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

craniologist (noun)	phrenologist (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