scholiast vs bookman

scholiast and bookman both are nouns.

Word	Noun	Adjective	Verb	Adverb
scholiast	Yes	No	No	No
bookman	Yes	No	No	No

As nouns, bookman is a hypernym of scholiast; that is, bookman is a word with a broader meaning than scholiast:

scholiast: a scholar who writes explanatory notes on an author (especially an ancient commentator on a classical author)
bookman: a learned person; someone who by long study has gained mastery in one or more disciplines

Other hypernyms of scholiast include scholar, scholarly person.

scholiast (noun)	bookman (noun)
a scholar who writes explanatory notes on an author (especially an ancient commentator on a classical author)	a learned person; someone who by long study has gained mastery in one or more disciplines