Previous solution:
abed, abet, ate, bad, bade, bat, bate, bated, bead, beat, bed, bet, beta, dab, date, deb, debt, eat, eta, tab, tad, tea, ted
abed, abet, ate, bad, bade, bat, bate, bated, bead, beat, bed, bet, beta, dab, date, deb, debt, eat, eta, tab, tad, tea, ted