Backward
Part of speech: adjective
Definition: Pertaining to the direction towards the back. Pertaining to the direction reverse of normal. Reluctant or unable to advance. Of a culture considered undeveloped or unsophisticated. Pertaining to a thought or value that is considered outdated. On that part of the field behind the batsman's popping crease. Further behind the batsman's popping crease than something else.
Part of speech: adverb
Definition: In the direction towards the back; backwards
Example sentence: It is what you do from now on that will either move our civilization forward a few tiny steps, or else... begin to march us steadily backward.
Rearwards
Part of speech: adverb
Definition: Rearward.
Part of speech: adjective
Definition: Rearward.