WordNet (r) 3.0 (2006):

dick
    n 1: someone who is a detective [syn: dick, gumshoe,
         hawkshaw]
    2: obscene terms for penis [syn: cock, prick, dick,
       shaft, pecker, peter, tool, putz]

Moby Thesaurus II by Grady Ward, 1.0:

29 Moby Thesaurus words for "dick":
   Dogberry, John Law, Sherlock, beagle, bluecoat, bobby, bull, cop,
   copper, eye, flatfoot, flattie, gendarme, gumshoe, gumshoe man,
   hawkshaw, investigator, peeler, pig, plainclothesman, private eye,
   shamus, skip tracer, sleuthhound, spotter, tec, the cops, the fuzz,
   the law