obstructionist vs disputant

obstructionist and disputant both are nouns.

Word	Noun	Adjective	Verb	Adverb
obstructionist	Yes	No	No	No
disputant	Yes	No	No	No

As nouns, disputant is a hypernym of obstructionist; that is, disputant is a word with a broader meaning than obstructionist:

obstructionist: someone who systematically obstructs some action that others want to take
disputant: a person who disputes; who is good at or enjoys controversy

Other hypernyms of obstructionist include controversialist, eristic.

obstructionist (noun)	disputant (noun)
someone who systematically obstructs some action that others want to take	a person who disputes; who is good at or enjoys controversy