Synonyms for Cork (same or very similar meaning)
WordNet sense 1 ((botany) outer tissue of bark; a protective layer of dead cells):
phellemWordNet sense 2 (a small float usually made of cork; attached to a fishing line):
bob, bobber, bobfloatWordNet sense 3 (close a bottle with a cork):
cork upFrom the ODE community, based on WordNetadd/edit