come forth vs leak

come forth is not a noun while leak is a noun.

Word	Noun	Adjective	Verb	Adverb
come forth	No	No	Yes	No
leak	Yes	No	Yes	No

As verbs, leak is a hyponym of come forth; that is, leak is a word with a more specific, narrower meaning than come forth:

Other hyponyms of come forth include pop out, radiate, escape, fall, debouch, come out, fall out.

come forth (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

come forth (verb)	leak (verb)
come out of	have an opening that allows light or substances to enter or go out
happen or occur as a result of something	enter or escape as through a hole or crack or fissure
	tell anonymously
	be leaked