“Reign” 1. “Reign” is a verb meaning to rule, esp. as a king EX: As long as they don’t get lazy, the Party will REIGN in Oceania forever EX: In the Terminator and Matrix movies, the machines REIGN in the future

“Reign” 1A. “Reign” is also a noun referring to a period of rule, esp. of a king or sovereignty EX: When Queen Elizabeth dies, Prince Charles will begin his REIGN as king of England EX: The REIGN of the dinosaurs ended with the mammals

“Rein” 2. “Rein” is a verb meaning to guide or control an animal (usually a horse) by a harness fastened about the head EX: REIN your horse through the gate and we can tie them up over here EX: You have to know how to REIN your horse better if you want to win the race

“Rein” 2A. “Rein” (usually reins) is the leather strap attached to the head harness of a horse, which is used to direct or control the animal EX: If you pull on the left REIN, the horse will turn left EX: When the rider dropped the REINS, the horse took off for the hills

“Rain” 3. “Rain” is a noun meaning a continuous, heavy descent of something, usually water from the sky/clouds EX: The RAIN soaked through his clothes and he caught a cold EX: The archers sent a RAIN of arrows falling onto the enemy soldiers

“Rain” 3A. “Rain” is also a verb meaning to fall or descend upon, most often with water EX: It will RAIN all day tomorrow so we can’t have the picnic EX: The crowd planned to RAIN insults upon the politician EX: The boxer wants to RAIN punches on his opponent