White-tops is a term used to describe a variety of plants with white-topped flowers, such as the common yarrow or common tansy. However, there are several other synonyms for these white-topped plants. One such synonym for white-tops is snow-tops. This is because the white flowers of these plants resemble small patches of snow. Another synonym for white-tops is prairie sage, a nod to the fact that many of these plants grow in prairie environments. Finally, the term feather-top can also be used to describe these plants as their white flowers give them a feathery appearance.