Here are some phrases and words related to April Fools' Day: 1. April Fools' Day - the holiday itself, celebrated on April 1st 2. Prank - a practical joke or mischievous act 3. Hoax - a false claim or story meant to deceive 4. Trick - a cunning or skillful act intended to deceive or outwit someone 5. Jokester - a person who enjoys making jokes or playing pranks 6. Gullible - easily fooled or deceived 7. "Fool me once, shame on you; fool me twice, shame on me" - a saying that means one should learn from being tricked and not fall for the same prank again 8. "Pulling someone's leg" - a phrase that means to play a joke or trick on someone 9. "You've been fooled!" - a phrase often said after someone has been tricked on April Fools' Day 10. "Don't be so gullible!" - a phrase often said to someone who falls for a prank too easily