HTOL, which stands for "happy to offer help", is a warm-hearted phrase used to express a willingness to assist others. However, there are several synonyms that can convey the same sentiment. One alternative phrase is "gladly at your service", indicating a readiness to aid. Another synonym is "delighted to assist", denoting enthusiasm in helping others. Additionally, "eager to lend a hand" expresses a keenness to offer support and guidance. "Willing to aid" is another synonym that shows a positive attitude towards assisting someone in need. These synonyms can be used interchangeably with HTOL to convey a genuine willingness to help others in various contexts.