fluid vs fluidness

fluid and fluidness both are nouns.

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

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

fluid (adjective)	fluidness (adjective)
subject to change; variable
in cash or easily convertible to cash
smooth and unconstrained in movement
characteristic of a fluid; capable of flowing and easily changing shape
affording change (especially in social status)