Letter on position 1 (p) changed: 12 words dips gips hips kips lips mips nips rips sips tips yips zips Letter on position 2 (i) changed: 4 words paps peps pops pups Letter on position 3 (p) changed: 8 words pias pics pies pigs pins pirs piss pits Letter on position 4 (s) changed: 4 words pipa pipe pipi pipy