There are several synonyms for the phrase "support aviation." One of the most common synonyms is "promote aviation," which means to encourage the growth and development of the aviation industry. Another synonym is "facilitate aviation," which means to make it easier for individuals and companies to engage in aviation activities. Additionally, "uphold aviation" is another synonym, which means to maintain and protect the principles and values of the aviation industry. "Foster aviation" is another synonym, which means to nurture and cultivate the growth of aviation. Finally, "champion aviation" is another synonym, which means to actively advocate for and defend the interests of the aviation industry.