Kuu is a Finnish word for "moon," and there are several synonyms that describe this natural satellite. Some examples include "kuutamo," which means moonlight, "kuunvalo," which translates to moon glow, and "kuunsäde," which can be interpreted as moonbeam. Another synonym for kuu is "kuupöly," which refers to moon dust. Some other phrases related to the moon that Finnish speakers use include "kuun kierto," meaning the moon's orbit, and "kuun nousu," which describes the moon's rise. These synonyms add variety and nuance to descriptions of the moon and its effects on the natural world.