reversible vs changeable

reversible is a noun but changeable is not a noun.

Word	Noun	Adjective	Verb	Adverb
reversible	Yes	Yes	No	No
changeable	No	Yes	No	No

reversible (noun)	changeable (noun)
a garment (especially a coat) that can be worn inside out (with either side of the cloth showing)

reversible (adjective)	changeable (adjective)
capable of reversing or being reversed	such that alteration is possible; having a marked tendency to change
capable of being reversed or used with either side out	capable of or tending to change in form or quality or nature
capable of assuming or producing either of two states	varying in color when seen in different lights or from different angles
capable of being reversed	subject to change