Synonyms: fifth wheel
Definition: a steering bearing that enables the front axle of a horse-drawn wagon to rotate
Similar words: bearing
Definition: a rotating support placed between moving parts to allow them to move easily
Synonyms: fifth wheel, spare
Definition: an extra car wheel and tire for a four-wheel vehicle
Similar words: car wheel
Definition: a wheel that has a tire and rim and hubcap; used to propel the car
Synonyms: deadwood, fifth wheel
Definition: someone or something that is unwanted and unneeded
Similar words: redundance, redundancy
Definition: the attribute of being superfluous and unneeded
Usage: the use of industrial robots created redundancy among workers