"Brock Air" is not an established term in English, so it is difficult to provide synonyms for it. However, if we assume "Brock Air" refers to an air travel company named "Brock", we can provide a list of synonyms for the term "air". Some possible synonyms for "air" in the context of air travel are: atmosphere, ozone, sky, heavens, open space, airspace, and stratosphere. These synonyms help describe the domain within which air travel occurs and add variety to the language used when discussing the concept of flying or aviation. However, it is essential to note that "Brock Air" was not a clear term to provide accurate synonyms.