Synonyms for Worm (same or very similar meaning)
WordNet sense 1 (a person who has a nasty or unethical character undeserving of respect):
insect, louse, dirt ballWordNet sense 2 (to move in a twisting or contorted motion, (especially when struggling)):
squirm, twist, wrestle, wriggle, writheFrom the ODE community, based on WordNetadd/edit