There are several synonyms for the phrase "went on airwaves." Common alternatives include "broadcasted," "aired," "transmitted," "telecasted," and "fired up." These words all indicate the act of sending a signal or message through the airwaves, typically via radio or television. Other possible synonyms might include "announced," "declared," or "pronounced," depending on the context and tone of the message being conveyed. Overall, the choice of synonym will depend on the desired emphasis or nuance of the communication, but any of these options can effectively and accurately convey the same basic idea.