The phrase "wax wanes" is often used to describe the cyclic nature of things, as it refers to the waxing or increasing of something, followed by its waning or decreasing. However, there are several synonyms that can be used to convey a similar meaning. For example, the words "ebb and flow" are commonly used to describe the natural cycle of tides or emotions. Other synonyms that can be used for "wax wanes" include "rise and fall," "swell and shrink," or "grow and diminish." Ultimately, all of these terms describe the inevitable fluctuation of things in life, whether it be the tide of the ocean or the ups and downs of our own emotions.