arguing vs contention

arguing and contention both are nouns.

Word	Noun	Adjective	Verb	Adverb
arguing	Yes	No	No	No
contention	Yes	No	No	No

As nouns, arguing and contention are synonyms defined as:

arguing and contention: a contentious speech act; a dispute where there is strong disagreement

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

arguing (noun)	contention (noun)
a contentious speech act; a dispute where there is strong disagreement	the act of competing as for profit or a prize
	a contentious speech act; a dispute where there is strong disagreement
	a point asserted as part of an argument