1) Absurdity 2) Fatuousness 3) Folly 4) Foolishness 5) French word used in English 6) Imbecility, dementia 7) Silliness 8) Unwiseness Found on https://www.crosswordclues.com/clue/fatuity
Fa·tu'i·ty noun [ Latin fatuitas , from fatuus foolish: confer French fatuité Confer Fatuous .] Weakness or imbecility of mind; stupidity. « Those many forms of popular fatuity .» I Taylor. Found on http://www.encyclo.co.uk/webster/F/12