fluidity vs liquidness

fluidity and liquidness both are nouns.

Word	Noun	Adjective	Verb	Adverb
fluidity	Yes	No	No	No
liquidness	Yes	No	No	No

As nouns, fluidity and liquidness are synonyms defined as:

Other synonyms of fluidity include fluidness, liquidity, runniness.

fluidity (noun)	liquidness (noun)
the property of flowing easily	the property of flowing easily
a changeable quality	the state in which a substance exhibits a characteristic readiness to flow with little or no tendency to disperse and relatively high incompressibility