obstructionist vs thwarter

obstructionist and thwarter both are nouns.

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

As nouns, obstructionist and thwarter are synonyms defined as:

obstructionist and thwarter: someone who systematically obstructs some action that others want to take

Other synonyms of obstructionist include obstructer, obstructor, resister.

obstructionist (noun)	thwarter (noun)
someone who systematically obstructs some action that others want to take	someone who systematically obstructs some action that others want to take