The term 'warmth of feeling' can be summarized by the crossword solution 'ARDOR', which is a five-letter word. ARDOR is defined as intense and passionate emotion, such as love or enthusiasm. It is often used to describe a strong feeling of affection or devotion. ARDOR is also used to describe a strong feeling of warmth or heat. In this context, ARDOR can be used to describe the warmth of feeling that comes from a strong emotional connection.