The phrase "kisses up to" is often used to describe someone who flatters or tries to gain favor with a person in power or authority. However, there are many synonyms to this phrase that can also be used in a similar context. These include words such as grovel, kowtow, butter up, brown-nose, and toady. Other synonyms include fawn over, suck up, curry favor, and pander. All of these words can be used to describe a person who uses excessive flattery or exaggerated praise in order to gain an advantage or favor from someone else. While there are many synonyms for "kisses up to," the underlying meaning remains the same - to seek favor through flattery.