The phrase "soft soap" refers to excessive flattery or ingratiating behavior towards someone for manipulative purposes. When searching for suitable synonyms, options include sweet talk, honeyed words, cajolery, blandishment, and adulation. Each of these alternatives refers to the art of flattery and manipulation in different ways. Sweet talk suggests seductive language used to influence someone's thoughts or decisions. Honeyed words often refer to smooth talking that is meant to lure someone into a false sense of security. Cajolery is typically associated with gentle persuasion or coaxing, while blandishment often implies the use of excessively flattering language. Adulation, the last synonym, implies excessive praise or worship of someone for ulterior motives.