Synonyms for Hemp (same or very similar meaning)
WordNet sense 1 (any plant of the genus Cannabis; a coarse bushy annual with palmate leaves and clusters of small green flowers; yields tough fibers and narcotic drugs):
cannabisWordNet sense 2 (a rope that is used by a hangman to execute persons who have been condemned to death by hanging):
halter, halter, hangman's rope, hangman's halter, hempen necktieFrom the ODE community, based on WordNetadd/edit