There are several synonyms that can be used in place of "paper airplane contest". A commonly used synonym is "paper plane competition", which is a similar phrase that expresses the same meaning. Another possible synonym is "paper aircraft race", which also describes a contest where participants compete with their handmade paper airplanes. Additionally, "flying paper craft challenge" could also serve as a synonym for a paper airplane contest. There are many ways to describe this popular pastime, but whatever term is used, it is always a fun and exciting activity that can be enjoyed by people of all ages.