[1] : WordNet (r) 2.0

clop
     v : make or move along with a sound as of a horse's hooves
         striking the ground syn: clump, clunk, plunk
     also: clopping, clopped
see also:
clump clunk plunk clopping clopped 

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

40 moby thesaurus words for "clop":
   bump, chink, click, clink, clump, clunk, crump, drub, dull thud,
   flick, flump, footfall, footstep, hippety-hop, hoofbeat, hop, jump,
   pace, pad, pat, patter, pitapat, pitter-patter, plump, plunk, pop,
   rap, skip, stamp, step, stomp, stride, tap, thud, thump, tick,
   tinkle, trample, tread, tunk

Clop >> C Words
Clop, definition of term: Clop
clop_pag1.html