Heehaw is a 6 letter English word. It's valid Scrabble word worth 15 points. It's valid Words with friends word worth 13 points.
You can make 28 anagrams from letters in heehaw (aeehhw).
An Americanism dating back to 1805-15; imitative gradational compound
From somewhere just out of their view had come the loud heehaw, heehaw of a donkey.