convertible vs cashable

convertible is a noun but cashable is not a noun.

Word	Noun	Adjective	Verb	Adverb
convertible	Yes	Yes	No	No
cashable	No	Yes	No	No

convertible (noun)	cashable (noun)
a car that has top that can be folded or removed
a sofa that can be converted into a bed
a corporate security (usually bonds or preferred stock) that can be exchanged for another form of security (usually common stock)

convertible (adjective)	cashable (adjective)
capable of being exchanged for or replaced by something of equal value	able to be converted into ready money or the equivalent
designed to be changed from one use or form to another
capable of being changed in substance as if by alchemy