That is the correct spelling of "stupidity" (inanity, foolishness).
That is the correct spelling for "stupidity" and "contagious." (It isn't always.)
His stupidity led to the accident.It was a moment of stupidity.
"Stupidity and stupid" are nouns. It is not common to turn a noun into a verb - and even then it is not correct practice. I know of no verb form of 'stupidity'.
The study of stupidity is called monology.
It can be both, because it depends on what you are comparing 'stupidity' to.
In piglatin, "stupidity" would be said as "upiditystay."
Noun = stupidity Adverb = stupidly Adjective = stupid
the fear of The Bible is stupidity.
the Greek word for Stupidity: is Ηλιθιότητα Pronounced: I̱lithióti̱ta
World Stupidity Awards happened in 2007.
Stupidity isn't a virus, but it sure is spreading like one.
The noun 'stupidity' is an abstract noun; a word for behavior that shows a lack of good sense or judgment; a word for a concept.