changeable vs fluid

changeable is not a noun while fluid is a noun.

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

changeable (noun)	fluid (noun)
	continuous amorphous matter that tends to flow and to conform to the outline of its container: a liquid or a gas
	a substance that is fluid at room temperature and pressure

changeable (adjective)	fluid (adjective)
such that alteration is possible; having a marked tendency to change	subject to change; variable
capable of or tending to change in form or quality or nature	in cash or easily convertible to cash
varying in color when seen in different lights or from different angles	smooth and unconstrained in movement
subject to change	characteristic of a fluid; capable of flowing and easily changing shape
	affording change (especially in social status)