different between incongruity vs discongruity

English

From Middle French incongruité, from Medieval Latin incongruitas

incongruity (countable and uncountable, plural incongruities)

The state of being incongruous, or lacking congruence.
An instance or point of disagreement
Synonyms: dissimilarity, discrepancy, inconsistency
A thing that is incongruous.

John A. Simpson and Edward S. C. Weiner, editors (1989) , “incongruity”, in The Oxford English Dictionary, 2nd edition, Oxford: Clarendon Press, ?ISBN

dis- +? congruity

discongruity (countable and uncountable, plural discongruities)

incongruity; disagreement; unsuitableness
- 1677, Matthew Hale, The Primitive Origination of Mankind, Considered and Examined According to the Light of Nature
  intrin?ecal discongruity of the one to the other

discongruity in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.

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