hoop

nouns

a light curved skeleton to spread out a skirt
is a part of
a skirt stiffened with hoops
is a type of (narrower)
the internal supporting structure that gives an artifact its shape
"the building has a steel skeleton"
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"
a small arch used as croquet equipment
horizontal circular metal hoop supporting a net through which players try to throw the basketball

verbs

bind or fasten with a hoop
"hoop vats"
is a type of (narrower)
bind with something round or circular