subterminal vs intermediate

subterminal is not a noun while intermediate is a noun.

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

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

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

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