impediment vs obstructer

impediment and obstructer both are nouns.

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

As nouns, impediment and obstructer are synonyms defined as:

Other synonyms of impediment include impedimenta, obstruction, obstructor.

impediment (noun)	obstructer (noun)
any structure that makes progress difficult	any structure that makes progress difficult
something immaterial that interferes with or delays action or progress	someone who systematically obstructs some action that others want to take