Descriptive words are words that means the same as the other word. They are also known as synonyms. 
Here are some examples of descriptive words for happy, good and funny:
happy - amused, blissful, delighted, cheerful, excited, glad, pleased, optimistic, loving
good - honorable, virtuous, terrific, super, splendid, good, outstanding, marvelous
funny - comical, amusing, humorous, whimsical, entertaining, laughable

Can you find descriptive words for said, run and good?
Download descriptive words worksheet here.