fermentologist vs specialist

fermentologist and specialist both are nouns.

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

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

fermentologist: a specialist in wine making
specialist: an expert who is devoted to one occupation or branch of learning

Other hypernyms of fermentologist include specialiser, specializer.

fermentologist (noun)	specialist (noun)
a specialist in wine making	an expert who is devoted to one occupation or branch of learning
	practices one branch of medicine