intermediate vs subterminal

intermediate is a noun but subterminal is not a noun.

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

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

intermediate (adjective)	subterminal (adjective)
lying between two extremes in time or space or state	near but not precisely at an end
around the middle of a scale of evaluation

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