graphologist vs specialiser

graphologist and specialiser both are nouns.

Word	Noun	Adjective	Verb	Adverb
graphologist	Yes	No	No	No
specialiser	Yes	No	No	No

As nouns, specialiser is a hypernym of graphologist; that is, specialiser is a word with a broader meaning than graphologist:

graphologist: a specialist in inferring character from handwriting
specialiser: an expert who is devoted to one occupation or branch of learning

Other hypernyms of graphologist include specialist, specializer.

graphologist (noun)	specialiser (noun)
a specialist in inferring character from handwriting	an expert who is devoted to one occupation or branch of learning