There are several synonyms for the phrase "need to be worked out". Some of these synonyms include "require resolution", "need to be addressed", "demand attention", "necessitate sorting", and "require fine-tuning". These synonyms are all commonly used in a variety of contexts where there is a need to resolve or address a particular issue, problem, or concern. They suggest that something is not quite right or complete and requires further attention to be rectified. By using these synonyms, one can convey a sense of urgency, importance, and the need for action in order to achieve a desired outcome or result.