Airmailed is a term used to describe sending mail or packages by air transportation. However, there are several phrases that can be used as synonyms for this word. For instance, the term "air courier" can be used when referring to sending documents or packages by air mail. Additionally, "air cargo" or "air freight" can be used when transporting goods or commercial items by air transport. Another synonym for "airmailed" is "air express delivery", which often implies a faster shipping time. Overall, there are many ways to express the idea of sending something via air transport, depending on the context and type of shipment involved.