Astro-navigators are individuals who navigate using the stars. However, there are several other synonym words that can be used to describe these individuals. A few examples include: 1. Celestial navigators: Those who navigate using celestial bodies, such as the sun, moon, and stars. 2. Stellar navigators: A synonym used for individuals who use the position of the stars to navigate their way. 3. Astronavigation experts: Those who specialize in navigating using the positions of celestial objects. 4. Skywatchers: An informal term used for individuals who observe the sky for navigation purposes. 5. Astrophysicists: While not necessarily always navigators, these individuals do study the movements of celestial objects. In summary, there are several synonyms used to describe those who navigate using the stars.