obstructer vs obstructionist

obstructer and obstructionist both are nouns.

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

As nouns, obstructer and obstructionist are synonyms defined as:

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

Other synonyms of obstructer include obstructor, resister, thwarter.

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