Wiktionary
sillinesses
n. (plural of silliness English)
Usage examples of "sillinesses".
Well, for a while there had been objectors, but first their own excesses and sillinesses discredited them, then later….
It was unhappily really meant, as far as I was conscious, as a 'children's story', and as I had not learned sense then, and my children were not quite old enough to correct me, it has some of the sillinesses of manner caught unthinkingly from the kind of stuff I had had served to me, as Chaucer may catch a minstrel tag.