WordNet sense 1 (a twist or aberration; especially a perverse or abnormal way of judging or acting):

warp

WordNet sense 2 (the amount by which a propagating wave is bent):

refraction, deflexion

WordNet sense 3 (the property of being bent or deflected):

bending

WordNet sense 4 (a turning aside (of your course or attention or concern)):

deviation, digression, diversion, divagation