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

blabby blebby blobby blowby brumby chubby clubby crabby crumby drabby dweeby flabby foreby globby goodby grabby grubby hereby knobby knubby nearby overby owerby plebby scabby scooby shabby slabby slobby slubby snobby snubby stubby swabby thumby trilby