The word "flaxes" refers to the plural form of "flax," which is a blue-flowered plant that has been cultivated for thousands of years for its fiber and oil. However, there are no direct antonyms for the word "flaxes" since it is a specific term. However, some opposite terms to "flax" can be "synthetic fiber," "artificial oil," "animal fibers," "animal fat," "non-natural," and "non-organic." These words describe things that are either man-made or not naturally sourced from plants, which are antonyms in relation to flax. Nonetheless, all these words are unrelated to the specific term "flaxes.