Before I begin, let me state that I'm a huge fan of the Creeper. I have always considered him the near perfect blend of the Joker's unpredictable madness combined with the brutal physicality of Batman. read more
Not to be a stickler, but there are characters crazier than The Joker, which is no insult to the man. For example, being crazy enough to be completely disconnected from reality, or be schizophrenic, etc etc, various things of that nature. read more
A climber climbs and a creeper creeps. The root words are: climb and creep respectively. For this answer the meanings of the words were taken in their noun forms and to mean plants. A climber trains up fences and trellises while a creeper grows along the ground, around another plant, or up a wall by means of extending stems or branches. read more