The term PART OF TMNT is composed of two crossword solutions: NINJA (5 letters) and MUTANT (6 letters). The Teenage MUTANT NINJA Turtles, commonly known as TMNT, are a team of four anthropomorphic turtles who are trained in the art of ninjutsu and named after four Renaissance artists. They were created by Kevin Eastman and Peter Laird in 1984 and have since become a popular franchise. NINJA refers to the martial arts training the turtles have received, while MUTANT refers to their mutation from regular turtles into anthropomorphic ones.