Mammoth Uncensored Word List:
36 words ending with op, 6 letters long

astoop barhop bedrop bishop callop carhop cartop collop dallop dikkop dollop gallop gollop hiphop hyssop inhoop jollop joypop laptop lollop maypop noncop outtop postop ragtop redtop saloop sannop scroop tiptop unhoop unprop unstop upprop wallop ziptop