SOLUTION TO PREVIOUS PUZZLE:

INFERS ens, ern, erns, fen, fens, fern, ferns, fie, fin, fine, finer, fines, fins, fir, fire, fires, firs, fries, ifs, infer, ins, ire, ires, ref, refs, rein, reins, resin, rife, rinse, rise, risen, serf, serif, serin, sin, sine, sir, sire, siren.