thwarter vs obstructor

thwarter and obstructor both are nouns.

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

As nouns, thwarter and obstructor are synonyms defined as:

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

Other synonyms of thwarter include obstructer, obstructionist, resister.

thwarter (noun)	obstructor (noun)
someone who systematically obstructs some action that others want to take	any structure that makes progress difficult
	someone who systematically obstructs some action that others want to take