List A:  plant, stamp, stand, blimp, stump, twigs, twins

List B:  cork, corn, fork, horn, tractor, orbit, thorn, forest

List C: bustle, channel, connect, empire, mention, peak, scholar, settle, vehicle, zigzag

List D: appall, dejected, depend, dreary, fanatic, impact, invade, isolate, occupy, reveal, rout, suspect, temporary, terror, tragic