leak vs leakage

leak and leakage both are nouns.

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

As nouns, leak and leakage are synonyms defined as:

Other synonyms of leak include escape, outflow.

leak (noun)	leakage (noun)
unauthorized (especially deliberate) disclosure of confidential information	the discharge of a fluid from some container
the discharge of a fluid from some container
an accidental hole that allows something (fluid or light etc.) to enter or escape
a euphemism for urination
soft watery rot in fruits and vegetables caused by fungi

leak (verb)	leakage (verb)
have an opening that allows light or substances to enter or go out
enter or escape as through a hole or crack or fissure
tell anonymously
be leaked