How many words?

rest, best, breast, bear, bare, rate, tea, sea, bra, sat, beat, feed, eat, ear, read, reading, beef, reef, reed, bed, need, dine, fine, fire, ride, breed, breeding, sing, ref, east, feast, seed, rise, beast, beating, bearing, bearings, rested, bid, bide, ride, side, gen, gin, see, sin, seen, safe, fate, date, neat, tee, bee, dig, dear, deer, raid, tribe, tribes, sit, rat, drift, drifting, grift, gift, bride, brief, find, teas, rats, bat, bats, bit, bid, big, bin, feet, nest, net, ring