inducement, bonus, reward, disincentive, incentivize, motivation, enticement, impetus, opportunity, perk, more...

disincentive, deterrent, discouragement, impediment, obstacle

reward, bribe, kickback, carrot, stick, carrot and stick, carrot on a stick, more...

little, strong, powerful, economic, financial, greater, additional, added, sufficient, more, further

sweeten the deal,   motivating factor,   spur to action,   way to encourage,   motive force,   motivating force,   additional bonus,   carrot on a stick,   reward pay,   primary motivation