Thrashes are a violent and forceful form of movement, usually associated with physical actions of beating or striking. Synonyms for 'thrashes' include thrashings, beatings, poundings, lashings, bashing, and drubbings. Other synonyms might include flailings, hammerings, pummelings, and buffeting. These words all convey a sense of violent movement or physical aggression, whether directed towards an object, person, or oneself. Other related words might include 'swinging,' 'swatting,' 'whipping,' and 'whacking.' Regardless of the specific synonym used, all of these words convey a sense of intense physical force, often resulting in pain or damage.