fiend feend noun WS #18

an evil spirit or demon; a person who is extremely wicked or cruel; a person who is excessively fond of or addicted to something

1. He was described as a fiend who showed no mercy to his victims.
2. The caffeine fiend couldn't function without at least four cups of coffee each morning.
3. The horror movie featured a terrifying fiend that haunted the old mansion.
4. She's a crossword puzzle fiend who completes several puzzles every day.
5. The detective was determined to catch the fiend responsible for the series of crimes.