If you want to refer to the direction towards the sky, there are several synonyms for the word "skyward". You can use the word "upward" to describe the direction of the sky. Another synonym can be "heavenward" which conveys the sense of reaching towards the heavens. You can also use the word "vertically" which refers to a direction that is perpendicular to the ground. The word "overhead" can also be used when referring to the sky. Other synonyms can include "aloft", "upwards," and "up high." All these words help to describe the same direction towards the sky and can be used interchangeably in a sentence.