Fluidity is a term used to describe the ability of a substance to flow freely. The crossword solutions for this term are FLUX (4 letters), EASE (4 letters), and LIQUIDITY (9 letters). FLUX refers to a continuous flow or movement, while EASE indicates a lack of difficulty or effort. LIQUIDITY is a term used to describe the ability of a substance to flow easily, such as a liquid. Together, these three words provide an accurate description of the concept of fluidity.