"White top" can refer to a variety of things, from a type of plant to a certain type of clothing. However, there are many synonyms that can be used to describe something similar in color or appearance. For example, the color of "white top" could be described as ivory, alabaster, snow-white, or chalky. Similarly, a shirt or blouse described as a "white top" could be referred to as a blouse, shirt, tee shirt, or tank top in white or off-white colors. It all depends on the context and intended meaning of the phrase "white top".