The phrase "kept hanging" can be used to describe a situation where someone is left in a state of uncertainty or waiting for an extended period of time. There are several synonyms that can be used to convey a similar meaning, such as "left in limbo," "strung along," and "kept in suspense." Other options include "dangling," "pending," and "in abeyance." Each of these phrases suggests a situation where a person is left without resolution or closure, often leaving them frustrated or anxious. By using different synonyms for "kept hanging," writers and speakers can add variety and nuance to their language, while always communicating the same essential idea.