Frazil is a word that is typically used in the context of ice formation. It refers to the tiny ice particles that are suspended in water and can create hazards for navigation and water treatment processes. Some possible synonyms for frazil might include "slush ice," "shaved ice," or "crushed ice." Other terms that could be used to describe similar phenomena might include "ice crystals," "graupel," or "sleet." Although these terms may not be exact synonyms for frazil, they are all related to the formation and movement of ice in water, and they can help to convey similar meanings and concepts.