Heavenward means toward the sky, or toward heaven. You look heavenward when you lift your eyes. You can use it as an adverb (look heavenward) or as an adjective (a heavenward glance). It is a quiet, bookish word. In ordinary talk, people say up or upward. Heavenward adds a little poetry, and sometimes a church colour, as if the sky and heaven were one and the same place. You will meet it in songs, stories, and older writing more than on the street. Some people say heavenwards, with an s, the same way some people say towards.