intermediate vs intermediation

intermediate and intermediation both are nouns.

Word	Noun	Adjective	Verb	Adverb
intermediate	Yes	Yes	Yes	No
intermediation	Yes	No	No	No

intermediate (noun)	intermediation (noun)
a substance formed during a chemical process before the desired product is obtained	the act of intervening for the purpose of bringing about a settlement

intermediate (adjective)	intermediation (adjective)
lying between two extremes in time or space or state
around the middle of a scale of evaluation

intermediate (verb)	intermediation (verb)
act between parties with a view to reconciling differences