spare
/ˈsper/
adjective
not being used; especially : held for emergency use
being over and above what is needed : superfluous
not liberal or profuse : sparing
verb
to forbear to destroy, punish, or harm
to refrain from attacking or reprimanding with necessary or salutary severity
to relieve of the necessity of doing or undergoing something
noun
a spare tire
a duplicate (such as a key or a machine part) kept in reserve
the knocking down of all 10 pins with the first 2 balls in a frame in bowling