contentious vs disputatious

contentious and disputatious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
contentious	No	Yes	No	No
disputatious	No	Yes	No	No

As adjectives, contentious and disputatious are synonyms defined as:

contentious and disputatious: inclined or showing an inclination to dispute or disagree, even to engage in law suits

Other synonyms of contentious include combative, disputative, litigious.

contentious (adjective)	disputatious (adjective)
inclined or showing an inclination to dispute or disagree, even to engage in law suits	inclined or showing an inclination to dispute or disagree, even to engage in law suits
involving or likely to cause controversy