• noun:   A person or thing that bolts, or runs suddenly.
• noun:   (botany, horticulture) A plant that grows larger and more rapidly than usual.
• noun:   (flour milling) A machine or mechanism that automatically sifts milled flour.
• noun:   A person who sifts flour or meal.
• noun:   (petroleum refining) A filter mechanism.
• noun:   (Australia, sports) An obscure athlete who wins an upset victory.
• noun:   (Australia, horseracing) A horse that wins at long odds.
• noun:   (New Zealand, sports) In team sports, a relatively little-known or inexperienced player who inspires the team to greater success.
• noun:   (US, politics) A member of a political party who does not support the party's nominee.
• noun:   (military, aviation) A missed landing on an aircraft carrier; an aircraft that has made a missed landing.
• noun:   A kind of fishing line; a boulter.
• verb:   (dialect) To smear or become smeared with a grimy substance.
• verb:   To sift or filter through a sieve or bolter.
• verb:   To fish using a bolter.
• verb:   To pound rapidly.
• verb:   (of a whale) To swim or turn sideways while eating.
• verb:   (military, aviation) To miss a landing on an aircraft carrier by failing to catch the arresting gear wires with the aircraft's tailhook.
• noun:   A surname originating as an occupation.

Related words...
Descriptive words...