resister vs obstructer

resister and obstructer both are nouns.

Word	Noun	Adjective	Verb	Adverb
resister	Yes	No	No	No
obstructer	Yes	No	No	No

As nouns, resister and obstructer are synonyms defined as:

resister and obstructer: someone who systematically obstructs some action that others want to take

Other synonyms of resister include obstructionist, obstructor, thwarter.

resister (noun)	obstructer (noun)
someone who systematically obstructs some action that others want to take	any structure that makes progress difficult
someone who offers opposition	someone who systematically obstructs some action that others want to take