It seems to me that the world has turned from the pursuit of
happiness - the pastime of choice at the start of the twentieth century - to
the pursuit of nonsense - the pastime of choice at the end of that century and
even more so today.
Whether there is a semantic difference between nonsense and nonsensical
things, I do not know. I also do not know whether I wish to know the
difference, as it is all the same difference. To me the word nonsensical seems
to be more sophisticated and intellectual - so I might prefer that as a fashion
statement.