Synonyms and related words :
amoral, conscienceless, corrupt, corrupted, criminal, crooked, dark, devious, dishonest, dishonorable, doubtful, dubious, evasive, felonious, fishy, fraudulent, ill-got, ill-gotten, immoral, inaccurate, indirect, inexact, insidious, not kosher, questionable, rotten, shady, shameless, shifty, sinister, slippery, suspicious, tricky, unconscienced, unconscionable, uncritical, underhand, underhanded, unethical, unexacting, unfinical, unfussy, unmeticulous, unpainstaking, unparticular, unprecise, unprincipled, unpunctilious, unpunctual, unrigorous, unsavory, unscrupulous, unstraightforward, without remorse, without shame