The word "kindful" is a relatively uncommon term that conveys the idea of being full of kindness or having a considerate nature. However, if you prefer to use a synonym for this word, there are several alternatives you may opt for. One possible synonym is "compassionate", which captures the essence of being understanding and showing empathy towards others. Another option is "benevolent", emphasizing the act of doing good and actively promoting the welfare of others. Alternatively, you may use "thoughtful" to describe someone who takes the time to consider and care for others' needs and feelings. These synonyms effectively convey the concept of being "kindful" in various ways.