changeable vs mobile

changeable is not a noun while mobile is a noun.

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

changeable (noun)	mobile (noun)
	sculpture suspended in midair whose delicately balanced parts can be set in motion by air currents

changeable (adjective)	mobile (adjective)
such that alteration is possible; having a marked tendency to change	moving or capable of moving readily (especially from place to place)
capable of or tending to change in form or quality or nature	having transportation available
varying in color when seen in different lights or from different angles	migratory
subject to change	affording change (especially in social status)
	capable of changing quickly from one state or condition to another