The term "put-up job" refers to a situation where someone is set up or tricked into something. Its antonyms, therefore, would be words that suggest honesty, transparency, and fairness. Some of the antonyms for "put-up job" are genuine, legitimate, bona fide, legitimate, unfeigned, real, and sincere. These words signify that a situation is not rigged or manipulated, but rather it is in its correct state. Another set of antonyms for "put-up job" include upright, ethical, honorable, fair, just, and straightforward. These words suggest that a situation or action is carried out with integrity, and no hidden agenda or deceit is involved.