Sergent rhymes with:
insurgent, resurgent, convergent, detergent, divergent, emergent, insurgent, resurgent, urgent, agent, astringent, bagent, cogent, contingent, convergent, detergent, diligent, divergent, emergent, exigent, indigent, indulgent, insurgent, intelligent, intransigent, largent, legent, migent, negligent, neugent, nugent, pageant, pungent, reagent, regent, resurgent, sargeant, sargent, sergeant, stringent, tangent, urgent, vigeant
Sergent sounds like:
sargeant, sargent, sergeant, shrikant