stoppage vs blockage

stoppage and blockage both are nouns.

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

As nouns, stoppage and blockage are synonyms defined as:

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

stoppage (noun)	blockage (noun)
the act of stopping something	the act of blocking
an obstruction in a pipe or tube	an obstruction in a pipe or tube
the state of inactivity following an interruption	the physical condition of blocking or filling a passage with an obstruction