Religion is when you believe in one entity and believe that he is the creater of all things and cause of him all things came into being.Superstition is something that you believe will happen to you with certain events.Like if a cat crosses your path you will have bad day
The only difference I see is that religion establishes values and morals (these values and morals are up for interpretation of course), whereas superstition is not. Other than that they seem closely related - if you're just looking at the definition of the two words
Superstition is an irrational belief in unseen, unproven forces that effect and govern our lives. No, wait. That's religion. I'm sorry, I got confused. Superstition is when you fear your action or inaction will have grave negative consequences, independent and regardless of known principles of cause and effect, then you are religious. I mean superstitious... OK I got it. If you believe that a black cat crossing your path on Friday while you are walking under a ladder dropping a mirror and spilling salt will bring you bad luck then you are superstitious. If you believe that not saying thank you to an invisible person before you eat and then not touching your two shoulders and forehead with your right hand (or is it the left hand?) will bring vengeance and fury upon your home, then you're religious.... What was the question?