The term 'boorish one' can be described by four crossword solutions: CHURL (5 letters), SLOB (4 letters), LOUT (4 letters), and YAHOO (5 letters). All of these words refer to someone who is rude, crude, or ill-mannered. A CHURL is an old-fashioned term for a rude, surly, or bad-tempered person. A SLOB is someone who is careless and untidy in their habits and appearance. A LOUT is a clumsy, boorish, or ill-mannered person. Finally, a YAHOO is a coarse, boorish, or brutish person. All of these words describe someone who is boorish or ill-mannered.