device

bluff, end run, feint

cheating, chicanery, cozenage, craft, crookery, cunning, deception, dupery, duplicity, fakery, jugglery, legerdemain, skulduggery (or skullduggery), subterfuge, swindling, trickery

fraud, gaff, hoax, sham, swindle

blind, front, smoke screen

apparatus, appliance, mechanism

contraption, contrivance, gadget, gizmo (also gismo), jigger

accessory (also accessary), accoutrement (or accouterment), adjunct, appendage, attachment

favor, one-sidedness, partisanship, prejudice

endowment, faculty, flair, genius, gift, knack, talent

addiction, appetite, fancy, fondness, like, liking, preference, taste

forte, speciality, specialty

convention, custom, habit, pattern, practice (also practise), routine, trick, way, wont

eccentricity, idiosyncrasy, kink, oddity, peculiarity, quirk, singularity