giddiness

noun

I nearly fell down with giddiness:

dizziness, light-headedness, loss of balance/equilibrium, spinning/swimming of the head;

faintness, weakness at the knees, unsteadiness, shakiness, wobbliness;

Scottish mirligoes, dwalm;

informal wooziness, legs like jelly, rubbery legs;

technical megrim, sturdy, scotoma;

archaic turnsick;

rare vertiginousness.

▷antonyms steadiness.