educationist vs specialist

educationist and specialist both are nouns.

Word	Noun	Adjective	Verb	Adverb
educationist	Yes	No	No	No
specialist	Yes	No	No	No

As nouns, specialist is a hypernym of educationist; that is, specialist is a word with a broader meaning than educationist:

educationist: a specialist in the theory of education
specialist: an expert who is devoted to one occupation or branch of learning

Other hypernyms of educationist include specialiser, specializer.

educationist (noun)	specialist (noun)
a specialist in the theory of education	an expert who is devoted to one occupation or branch of learning
	practices one branch of medicine