The Collaborative International Dictionary of English v.0.48:

Charioteer \Char`i*ot*eer"\, n.
   1. One who drives a chariot.
      [1913 Webster]

   2. (Astron.) A constellation. See Auriga, and Wagones.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Coachman \Coach"man\, n.; pl. Coachmen.
   1. A man whose business is to drive a coach or carriage.
      [1913 Webster]

   2. (Zool.) A tropical fish of the Atlantic ocean (Dutes
      auriga); -- called also charioteer. The name refers to
      a long, lashlike spine of the dorsal fin.
      [1913 Webster]

WordNet (r) 3.0 (2006):

charioteer
    n 1: the driver of a chariot
    2: a conspicuous constellation in the northern hemisphere;
       between Great Bear and Orion at edge of Milky Way [syn:
       Auriga, Charioteer]