leak out vs leak

leak out is not a noun while leak is a noun.

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

As verbs, leak out and leak are synonyms defined as:

leak out (noun)	leak (noun)
	unauthorized (especially deliberate) disclosure of confidential information
	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 out (verb)	leak (verb)
be leaked	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