Mammoth Uncensored Word List:
59 words ending with op, 7 letters long

agitpop airdrop airstop alcopop bellhop caltrop cooktop copshop cowflop cowplop desktop develop dewdrop dustmop eardrop eggdrop envelop escalop exaflop eyedrop flattop foretop ginshop gumdrop gunshop hardtop hatshop hencoop hightop hilltop maintop milksop misstop nonstop outcrop outdrop outroop overtop palmtop pitprop potshop ripstop rollmop rolltop rooftop rumshop scallop scollop shallop soursop tabstop teashop toyshop treetop trollop wardrop wavetop winesop worktop