A shady deal can be defined as a dishonest or suspicious transaction. Some antonyms or opposite words to help describe an honest deal could be righteous, fair, ethical, transparent, or trustworthy. A righteous deal is one which is morally correct or just. A fair deal is one which offers equal opportunities and benefits to all parties involved. An ethical deal follows moral principles and standards of behavior, while a transparent deal is open, clear, and easily understood. A trustworthy deal is one which inspires confidence and reliability. Using these antonyms for shady deal can help to identify a deal that is respectable, legitimate, and above board.