reversible vs changeful

reversible is a noun but changeful is not a noun.

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

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

reversible (adjective)	changeful (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 assuming or producing either of two states
capable of being reversed