Buttering up is a commonly used phrase to describe the act of flattery and praise, typically in an attempt to gain favor or advantage. There are several synonyms that can be used in place of buttering up, such as sweet talking, cajoling, wooing, or cozying up. Other synonyms include complimenting excessively, pandering, fawning, or ingratiating oneself. These terms all encompass the idea of trying to win someone over through excessive praise or flattery. While these tactics may work in the short term, they can be seen as insincere and manipulative in the long run.