implosion vs blockage

implosion and blockage both are nouns.

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

As nouns, blockage is a hypernym of implosion; that is, blockage is a word with a broader meaning than implosion:

Other hypernyms of implosion include closure, occlusion.

implosion (noun)	blockage (noun)
the initial occluded phase of a stop consonant	the act of blocking
a sudden inward collapse	an obstruction in a pipe or tube
	the physical condition of blocking or filling a passage with an obstruction