vanity (n.) 2
foolishness, absurdity, inanity
H8 I.i.85 [Buckingham to Abergavenny and Norfolk, of an event] What did this vanity / But minister communication of / A most poor issue?
KJ V.vii.13 [Prince Henry to Pembroke] O vanity of sickness!
Tim I.ii.129 [Apemantus to himself, of the masque] what a sweep of vanity comes this way!