Previous solution:
age, ager, are, areg, art, ate, ear, eat, era, erg, eta, gar, gat, gate, gear, get, grate, great, rag, rage, rat, rate, ret, retag, tag, tar, tare, targe, tea, tear, teg
age, ager, are, areg, art, ate, ear, eat, era, erg, eta, gar, gat, gate, gear, get, grate, great, rag, rage, rat, rate, ret, retag, tag, tar, tare, targe, tea, tear, teg