stoppage vs obstructer

stoppage and obstructer both are nouns.

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

As nouns, obstructer is a hypernym of stoppage; that is, obstructer is a word with a broader meaning than stoppage:

Other hypernyms of stoppage include impediment, impedimenta, obstruction, obstructor.

stoppage (noun)	obstructer (noun)
the act of stopping something	any structure that makes progress difficult
an obstruction in a pipe or tube	someone who systematically obstructs some action that others want to take
the state of inactivity following an interruption