reign
(to rule as king, queen, or emperor)
- How long did King Henry VIII reign.
- Better to reign in hell than serve in heaven.
rein
(a long narrow leather strip which helps a rider to control and direct a horse)
- He pulled on the reins, and the horse stopped.
- Pull the right rein to turn the horse right.
(to control, to restrain)
- His parents always kept him on a tight rein.
- We have to keep a tight rein on spending.