Solution

ace, act, ape, bat, bet, cab, cap, cat, cop, cot, eat, fat, fit, hat, hot, ice, oat, pat, pet, pit, sat, sip, sit, tap, tip, top
bait, bath, beat, boat, cafe, cast, coat, cope, cost, east, face, fact, fate, fist, host, pact, past, path, pate, pace, pets, pick, site, soap, soft, spit, stop, taco, tape
beast, boast, boats, coast, feast, haste, paste, patio, peace, peach, spice, spite, topic
castle, feast, foist, static, poetic