fluid vs solvent

fluid

noun
  • A liquid (as opposed to a solid or gas). 

  • Any substance which can flow with relative ease, tends to assume the shape of its container, and obeys Bernoulli's principle; a liquid, gas or plasma. 

  • Intravenous fluids. 

adj
  • In a state of flux; subject to change. 

  • Of or relating to fluid. 

  • Moving smoothly, or giving the impression of a liquid in motion. 

  • Convertible into cash. 

  • Genderfluid. 

solvent

noun
  • A fluid that dissolves a solid, liquid, or gaseous solute, resulting in a solution. 

  • That which resolves. 

adj
  • Able to pay all debts as they become due, and having no more liabilities than assets. 

  • Having the power of dissolving; causing solution. 

How often have the words fluid and solvent occurred in a corpus of books? (source: Google Ngram Viewer )