Letter on position 1 (p) changed: 6 words ayres byres eyres gyres lyres tyres Letter on position 2 (y) changed: 4 words pares peres pores pures Letter on position 3 (r) changed: 2 words pynes pyxes Letter on position 4 (e) changed: 1 word pyros Letter on position 5 (s) changed: 1 word pyrex