"Xanthou" is not a word that appears in the English language or any of its widely used dictionaries, so no synonyms can be provided. However, the closest word is "xanthous," which means yellow or a color similar to yellow, and yellowish in complexion. Synonyms for "xanthous" include golden, lemon, saffron, straw-colored, ochre, amber, and canary. These words are often used to describe anything that has a yellow hue, such as the sun, flowers, fruits, or even hair and eyes of people. So, if you encounter the word "xanthous" or anything related to the color yellow, you now know some synonyms you can use to better describe them.