The term "seadog" is often used to describe someone who has spent many years at sea. However, there are many other words that can be used to describe this type of person. Some synonyms for seadog include sailor, mariner, seaman, old salt, and sea veteran. Each of these words captures a different aspect of the seafaring lifestyle, from the experience and knowledge gained over years of sailing to the grit and determination needed to survive the rigors of life on the water. Ultimately, whether you use the word seadog or one of its synonyms, it serves as a reminder of the dedication and commitment required to navigate the high seas.