changeable vs unstable

changeable and unstable both are adjectives.

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

changeable (adjective)	unstable (adjective)
such that alteration is possible; having a marked tendency to change	lacking stability or fixity or firmness
capable of or tending to change in form or quality or nature	subject to change; variable
varying in color when seen in different lights or from different angles	suffering from severe mental illness
subject to change	disposed to psychological variability
	highly or violently reactive
	affording no ease or reassurance