Rockoon is a 7 letter English word. It's valid Scrabble word worth 13 points. It's valid Words with friends word worth 15 points.
You can make 61 anagrams from letters in rockoon (cknooor).
1950-55; rock(et1) + (ball)oon
I also understand that a rockoon is a combination of a rocket and a balloon.
13
15