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