1. (n.) One who bolts; esp.: (a) A horse which starts suddenly aside. (b) A man who breaks away from his party.

2. (n.) One who sifts flour or meal.

3. (n.) An instrument or machine for separating bran from flour, or the coarser part of meal from the finer; a sieve.

4. (n.) A kind of fishing line. See Boulter.

Sabbath-breaker atheist atheistic backslider backsliding blasphemer blasphemous bolter collaborationist collaborative collaborator convert defector degenerate demurrer deserter disloyal dissenter dissentient dissident faithless fallen fallen from grace fifth columnist impious irreligious irreverent lapsed mugwump nonconformist objector opinionist opposition voice profanatory profane proselyte protestant protester quisling rat recidivist recidivistic recreant recusant renegade renegado renegate reversionist runagate sacrilegious sacrilegist schismatic seceder secessionist sectarian sectary separatist strikebreaker tergiversant tergiversating tergiversator traitor traitorous treasonable treasonous turnabout turncoat turntail unbeliever undutiful