fungible vs exchangeable

fungible is a noun but exchangeable is not a noun.

Word	Noun	Adjective	Verb	Adverb
fungible	Yes	Yes	No	No
exchangeable	No	Yes	No	No

fungible (noun)	exchangeable (noun)
a commodity that is freely interchangeable with another in satisfying an obligation

fungible (adjective)	exchangeable (adjective)
of goods or commodities; freely exchangeable for or replaceable by another of like nature or kind in the satisfaction of an obligation	suitable to be exchanged
	capable of being exchanged for or replaced by something of equal value
	capable of replacing or changing places with something else; permitting mutual substitution without loss of function or suitability