When we talk about "keep hanging", we may refer to a variety of different actions or situations. Depending on the context, there are a number of synonyms that might be appropriate. For example, if we mean that someone is waiting for a long time without any resolution, we might say they are lingering, waiting, or biding their time. Similarly, if we mean that someone is holding on to something despite difficulties or setbacks, we might refer to them as persevering, persisting, or continuing. Finally, we might also use the phrase "keep hanging" to mean that someone is procrastinating or delaying, in which case we might use synonyms like postponing, deferring, or stalling.