artfulness, clandestine behavior, clandestinity, covertness, craft, cunning, deceit, deceitfulness, duplicity, falseheartedness, falseness, guile, hypocrisy, indirection, insidiousness, prowl, prowling, shiftiness, slinkiness, slyness, sneak attack, sneakiness, stalking, stealth, stealthiness, surreptitiousness, treacherousness, underground activity, underhand dealing, underhandedness