mediation vs mediate

mediation is a noun but mediate is not a noun.

Word	Noun	Adjective	Verb	Adverb
mediation	Yes	No	No	No
mediate	No	Yes	Yes	No

mediation (noun)	mediate (noun)
the act of intervening for the purpose of bringing about a settlement
a negotiation to resolve differences that is conducted by some impartial party

mediation (adjective)	mediate (adjective)
	acting through or dependent on an intervening agency
	being neither at the beginning nor at the end in a series

mediation (verb)	mediate (verb)
	act between parties with a view to reconciling differences
	occupy an intermediate or middle position or form a connecting link or stage between two others