occlusion vs stoppage

occlusion and stoppage both are nouns.

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

As nouns, occlusion and stoppage are synonyms defined as:

Other synonyms of occlusion include block, blockage, closure, stop.

occlusion (noun)	stoppage (noun)
the act of blocking	the act of stopping something
an obstruction in a pipe or tube	an obstruction in a pipe or tube
(dentistry) the normal spatial relation of the teeth when the jaws are closed	the state of inactivity following an interruption
(meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloft
closure or blockage (as of a blood vessel)