This is a great brainstorming activity for many levels of math. I give it to my students as an easy middle school homework the first couple of weeks of school. Sometimes I even turn it into a team building contest to see which group can come up with the most words.
Looking for some ideas or pre-made classroom art? Check out my addition and subtraction word clouds
http://www.teacherspayteachers.com/Product/Addition-and-Subtraction-Math-WordsActivity-and-Classroom-Art-579107