Tenderheartedly is a beautiful word that evokes feelings of compassion, empathy, and kindness. If you are looking for synonyms that can convey a similar sentiment, then you can consider using words like affectionately, kindly, gently, lovingly, softly, or sympathetically. Each of these words conveys a sense of warmth and tenderness that can help you express your emotions and thoughts in the best possible way. They are excellent alternatives to the word tenderheartedly and can help you create a more elegant and nuanced piece of writing. So, whether you are writing a letter to a loved one or composing a poem, these words can come in handy.