The term "billow" refers to a large, rolling mass of something, such as clouds or waves. If you're looking for synonyms to describe "more billow", there are many options. For example, you could use "swell," "surge," "heave," "tide," or "crest." Other possibilities include "rolling," "tumbling," "undulating," "rippling," or "flowing." Each of these words can help you to convey the sense of movement, power, and majesty that is often associated with billowing objects. Whether you're writing about the waves crashing on a beach or the clouds moving across the sky, these synonyms can help you find the right words to bring your description to life.