Boorish, a. — Webster enters it under “boorish”
Like a boor; clownish; uncultured; unmannerly. -- Boor"ish*ly, adv. -- Boor"ish*ness, n. Which is in truth a gross and boorish opinion. Milton.
Shades of meaning
Fernald lists boorishness only as an antonym, under address, refinement.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given