5 letters:
bacot, batak, bobac, cabob, cabot, cagot, capac, capet, capoc, capot, gadid, godet, kabat, kabob, kapok, kaput, pagad, pagod, patak, poket, popet, popup, tabac, tabid, tabuk, tapet, tobit, topet, topog

6 letters:
backup, badaud, bocock, bocook, bodock, cockup, docket, dodded, doquet, dotted, kabook, kopeck, packet, padauk, padded, patted, pocket, pocock, pop-up, ptotic, tacaud, tacket, takach, tappet, top-up, toquet

7 letters:
bacchic, back-up, baggott, caddock, cock-up, coppock, docquet, paddack, paddock