argy-bargy vs contestation

argy-bargy and contestation both are nouns.

Word	Noun	Adjective	Verb	Adverb
argy-bargy	Yes	No	No	No
contestation	Yes	No	No	No

As nouns, contestation is a hypernym of argy-bargy; that is, contestation is a word with a broader meaning than argy-bargy:

argy-bargy: a verbal dispute; a wrangling argument
contestation: a contentious speech act; a dispute where there is strong disagreement

Other hypernyms of argy-bargy include arguing, argument, contention, controversy, disceptation, disputation, tilt.

argy-bargy (noun)	contestation (noun)
a verbal dispute; a wrangling argument	a contentious speech act; a dispute where there is strong disagreement