hoop -
a rigid circular band of metal or wood or other material used for holding or fastening or hanging or pulling; "there was still a rusty iron hoop for tying a horse"
carabiner,
karabiner,
snap ring an oblong metal ring with a spring clip; used in mountaineering to attach a rope to a piton or to connect two ropes
collar a figurative restraint; "asked for a collar on program trading in the stock market"; "kept a tight leash on his emotions"; "he's always gotten a long leash"
curtain ring a circular ring for holding up a curtain
key ring a circular ring of metal for holding keys
napkin ring a circular band used to hold a particular person's napkin
nose ring a ring worn on the nose as an ornament or on the nose of an animal to control it
rim the outer part of a wheel to which the tire is attached
rim the outer part of a wheel to which the tire is attached
tire,
tyre hoop that covers a wheel; "automobile tires are usually made of rubber and filled with compressed air"
hoop -
a light curved skeleton to spread out a skirt
