(n)kind, sort, form, varietya category of things distinguished by some common characteristic or quality“sculpture is a form of art”, “what kinds of desserts are there?”
(a)kindhaving or showing a tender and considerate and helpful nature; used especially of persons and their behavior“kind to sick patients”, “a kind master”, “kind words showing understanding and sympathy”, “thanked her for her kind letter”
(s)kind, genialagreeable, conducive to comfort“a dry climate kind to asthmatics”, “the genial sunshine”, “hot summer pavements are anything but kind to the feet”