Examples from the Web for sweetener
Democrats view revenue as taxes, not airport fees, which Republicans have offered up as a sweetener.Six Members of Supercommittee Break Away in Bid to Forge Debt Deal|Eleanor Clift|November 11, 2011|DAILY BEAST
Politeness is the sweetener of human society and gives a charm to everything said and done.Guide to Hotel Housekeeping|Mary E. Palmer
He put to his lips the firestone ring—the Sweetener—and blew but one note through it.
And he put the Sweetener to his lips and whistled the Plough up to him.