liquidness vs fluidity

liquidness and fluidity both are nouns.

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

As nouns, liquidness and fluidity are synonyms defined as:

Other synonyms of liquidness include fluidness, liquidity, runniness.

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