obstructor vs obstructer

obstructor and obstructer both are nouns.

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

As nouns, obstructor and obstructer are synonyms defined as:

Other synonyms of obstructor include impediment, impedimenta, obstruction.

As nouns, obstructor and obstructer are synonyms defined as:

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

Other synonyms of obstructor include obstructionist, resister, thwarter.

obstructor (noun)	obstructer (noun)
any structure that makes progress difficult	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