3 letters:
pad, pod

4 letters:
bade, cade, dade, fade, gade, hade, haid, heyd, jade, kade, lade, laid, made, maid, pace, page, paik, pail, pain, pais, pait, paiz, pake, pale, pane, pape, pate, pave, pays, peed, pied, raid, wade, waid, zaid

5 letters:
bayed, fayed, heyde, mayde, paged, paige, paign, paine, paled, paved, payer, payne, pei's, rayed, shade, spade, spaid, spayd, waide

6 letters:
paille, pained, parade, payday, played, poohed, prayed, preyed, schade, spayde, they'd

7 letters:
arrayed, weighed