1. Feebleness of intellect; silliness; foolishness.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• faggity,
• maturty,
• fattty,
• hatity,
• fatility,
• fatilty,
• fatuige,
• sateity,
• faciity,
• fuity,
• faility,
• famity,
• faulity,
• matuirty,
• faity,
• fatith,
• facity,
• fatuitty,
• fattuity,
• naturty

The adjective form of the word "fatuity" is "fatuous".

The plural of the "fatuity" can be the "fatuities".

The singular of the "fatuity" can be the "fatuity".