I always thought the word "simpleness" didn't exist and this was even confirmed by some American friends of mine. However, I tried to look it up on some online dictionaries and I was surprised to find out that some of them report this word while others don't. What's the story behind "simpleness"?
closed as general reference by MετάEd, Kristina Lopez, Hellion, Kris, choster May 22 '13 at 13:29
This question is too basic; it can be definitively and permanently answered by a single link to a standard internet reference source designed specifically to find that type of information. If this question can be reworded to fit the rules in the help center, please edit the question.
Simpleness does not necessarily mean the same as simplicity.
For example, simple time in music is a time signature (basic rhythm) which is not compound time. Simple time has simpleness, not simplicity.
OED has a number of similar definitions: