When you need a word to describe something (or someone) that causes or is intended to cause laughter, you might pick jocose or a synonym such as humorous, witty, facetious, or jocular. Of those terms, humorous is the most generic and can be applied to anything that provokes laughter. Witty suggests cleverness and a quick mind, while facetious is a word for something that is not meant to be taken seriously. Jocose and jocular both imply a habitual waggishness and a fondness for joking.