Al Na'ir is the Arabic term for a supergiant star located in the constellation Vela. While there may not be any direct synonyms for this specific term, there are certainly related words that can describe it. For example, a supergiant star could also be called a luminous star or a giant star. Additionally, the constellation Vela could be referred to as simply the Sail, which is the English translation of its Latin name. Other terms related to astronomy, such as celestial or cosmological, may also be used to describe Al Na'ir and other stars or constellations.