vagarity

From vagary +‎ -ity.

vagarity (countable and uncountable, plural vagarities)

1. (rare) The character or state of being vagarious; capriciousness; irregularity.
2. (rare) Vagary.

• William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “vagarity”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.
• the online edition of the Oxford English Dictionary (lists it as "rare" with one cite from 1886)