The Collaborative International Dictionary of English v.0.48:
Trampler \Tram"pler\, n. One who tramples; one who treads down; as, a trampler on nature's law. --Cowper. [1913 Webster]WordNet (r) 3.0 (2006):
trampler n 1: someone who injures by trampling 2: someone who walks with a heavy noisy gait or who stamps on the ground [syn: stamper, stomper, tramper, trampler]