One of them is synonymous. Clumsiness is a learned (or lack of) behavior, whereas children can be taught to be mindful of their actions. As a child who grew up in a poor Eastern European family, I was punished for my clumsiness, which led me to become an adult who pays attention to what he does. While I empathize with individuals who have significant cognitive deficits, I generally have absolutely no tolerance for those who do not make an effort to be mindful of their actions.