inconvertible vs convertible

inconvertible is not a noun while convertible is a noun.

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

inconvertible (noun)	convertible (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)

inconvertible (adjective)	convertible (adjective)
used especially of currencies; incapable of being exchanged for or replaced by another currency of equal value	capable of being exchanged for or replaced by something of equal value
not capable of being changed into something else	designed to be changed from one use or form to another
	capable of being changed in substance as if by alchemy