disputation vs contestation

disputation and contestation both are nouns.

Word	Noun	Adjective	Verb	Adverb
disputation	Yes	No	No	No
contestation	Yes	No	No	No

As nouns, disputation and contestation are synonyms defined as:

disputation and contestation: a contentious speech act; a dispute where there is strong disagreement

Other synonyms of disputation include arguing, argument, contention, controversy, disceptation, tilt.

disputation (noun)	contestation (noun)
the formal presentation of a stated proposition and the opposition to it (usually followed by a vote)	a contentious speech act; a dispute where there is strong disagreement
a contentious speech act; a dispute where there is strong disagreement