[1] : The Collaborative International Dictionary of English v.0.48

boatman \boat"man\, n.; pl. boatmen.
   1. a man who manages a boat; a rower of a boat.
      1913 webster

            as late the boatman hies him home.    --percival.
      1913 webster

   2. zool. a boat bug. see boat bug.
      1913 webster
see also:
boatmen boat bug 

[2] : The Collaborative International Dictionary of English v.0.48

boat bug \boat" bug`\ zool.
   an aquatic hemipterous insect of the genus notonecta; -- so
   called from swimming on its back, which gives it the
   appearance of a little boat. called also boat fly, boat
   insect, boatman, and water boatman.
   1913 webster
see also:
notonecta boat fly boat insect boatman water boatman 

[3] : WordNet (r) 2.0

boatman
     n : someone who drives or rides in a boat syn: boater, waterman
see also:
boater waterman 

[4] : Moby Thesaurus II by Grady Ward, 1.0

18 moby thesaurus words for "boatman":
   bargee, bargeman, barger, boat-handler, boater, boatsman, ferrier,
   ferryman, galley slave, gondolier, lighterman, oar, oarsman,
   punter, rower, waterman, yachter, yachtsman

Boatman >> B Words
Boatman, definition of term: Boatman
boatman_pag1.html

Water Boatman >> W Words
Water Boatman, definition of term: Water Boatman
water+boatman_pag1.html