bookworm vs bookman

bookworm and bookman both are nouns.

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

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

bookworm: a person who pays more attention to formal rules and book learning than they merit
bookman: a learned person; someone who by long study has gained mastery in one or more disciplines

Other hypernyms of bookworm include scholar, scholarly person.

bookworm (noun)	bookman (noun)
someone who spends a great deal of time reading	a learned person; someone who by long study has gained mastery in one or more disciplines
a person who pays more attention to formal rules and book learning than they merit