unicycle, monocycle
['walking stick, walkingstick, stick insect', 'swimming trunks, bathing trunks', 'radio, wireless', 'punching bag, punch bag, punching ball, punchball', 'trimaran', 'ashcan, trash can, garbage can, wastebin, ash bin, ash-bin, ashbin, dustbin, trash barrel, trash bin', 'bobsled, bobsleigh, bob']