an alternate would be; if you forget/lose/can't have something, you can replace it with something else. Ex; Bobby (I don't know any Bobby's so I'm going to use this name) forgot to bring his football, so we kicked a turkey around.
Alternate is a verb that means to occur in turn repeatedly. Here are two example sentences: • "bouts of depression alternate with periods of elation". • "she was asked to attend on alternate days" Words similar to alternate: • follow on another • take turns • rotate • work/act in sequence • be interspersed • be staggered