intermediate vs in-between

intermediate is a noun but in-between is not a noun.

Word	Noun	Adjective	Verb	Adverb
intermediate	Yes	Yes	Yes	No
in-between	No	Yes	No	No

intermediate (noun)	in-between (noun)
a substance formed during a chemical process before the desired product is obtained

intermediate (adjective)	in-between (adjective)
lying between two extremes in time or space or state	being neither at the beginning nor at the end in a series
around the middle of a scale of evaluation

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