outpouring vs leakage

outpouring and leakage both are nouns.

Word	Noun	Adjective	Verb	Adverb
outpouring	Yes	No	No	No
leakage	Yes	No	No	No

As nouns, leakage is a hyponym of outpouring; that is, leakage is a word with a more specific, narrower meaning than outpouring:

Other hyponyms of outpouring include jet, spirt, spurt, squirt, escape, leak, outflow.

outpouring (noun)	leakage (noun)
a large flow	the discharge of a fluid from some container
the rapid and continuous delivery of linguistic communication (spoken or written)
the pouring forth of a fluid
a sudden rapid flow (as of water)
a natural flow of ground water