In basketball, why is a rebound simply not just called a bounce, ball bounce, or re-bounce? What exactly is a rebound? Also, why is a date with someone used to forget another date simply also called a rebound? What is the connection?
Bounce refers to dribbling a basketball. Re-bounce would mean to dribble again but it is not English so it would have no meaning.
Rebound is actually a word used when a ball or anything hits a hard object and deflects somewhere else. This isn't just a basketball term.
The connection with the date, is using a sports analogy. It is a rebound date because you missed on your other date/relationship but got another date quickly, just like if you missed your shot and got a rebound.