Synonyms for Donnish:

adj.

all (adjective)
academic, pedantic.
didactic (adjective)
academic, pedantic.
didactical (adjective)
Pedantical.
inkhorn (adjective)
bookish, literary, formalistic.
pedantic (adjective)
scholastic.
pedantical (adjective)
Inkhorn.

n.

brilliant, bookish, quick, Pedantical, teach, smart, attitude, scholastic, Inkhorn, bright, able, clear-sighted, formalistic, literary, intelligent, flexible, wise, discerning. donnish (noun)
academic, scholarly, pedantic.

Other synonyms:

formalistic, Pedantical, Inkhorn. literary, scholastic. bookish. Other relevant words:
formalistic, bookish, scholastic, Pedantical, literary, Inkhorn.