Unhorse

(v. t.) To throw from a horse; to cause to dismount; also, to take a horse or horses from; as, to unhorse a rider; to unhorse a carriage.

Thesaurus Entries

alight, buck off, climb down, depose, deracinate, dislodge, dismount, get down, get off, land, light, overset, overturn, perch, pitch, root out, root up, settle, throw off, topple, touch down, tumble, unplace, unsaddle, unseat, uproot