If you find this one word interesting, try this URL for several more:
http://www.spellingbee.com/archive.htmcareer 
     Definition: to go at top speed especially in a headlong manner 
     Example sentence: "He darted onward—straight, headlong—dashing through brier and brake, and
     leaping gate and fence as madly as his dog, who careered with loud and sounding bark before him."
     (Charles Dickens, Oliver Twist) 
     Did you know? 
          In the days when mounted knights participated in jousting matches, one popular contest
          required a horseman to ride around closely placed barriers and insert his lance through
          small metal rings. The activity necessitated short gallops at full speed and a lot of turning.
          By the late 1500s, English speakers were referring to such short all-out gallops with the
          noun career (from Middle French carriere) and we were using the verb career to mean "to
          gallop for a short burst at full speed." By the mid-17th century, the verb had been
          extended to the now familiar sense of "to move at top speed." The implicit headlong or
          reckless manner in this speed is perhaps a legacy of the contortions and twistings of the
          jousting steed.