fluid vs solid

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. 

solid

noun
  • A substance in the fundamental state of matter that retains its size and shape without need of a container (as opposed to a liquid or gas). 

  • An article of clothing which is of a single color throughout. 

  • Food which is not liquid-based. 

  • A three-dimensional figure (as opposed to a surface, an area, or a curve). 

  • A favor. 

adv
  • Solidly. 

  • Without spaces or hyphens. 

adj
  • Financially well off; wealthy. 

  • Continuous; unbroken; not dotted or dashed. 

  • Strong or unyielding. 

  • Worthy of credit, trust, or esteem; substantial; not frivolous or fallacious. 

  • That can be picked up or held, having a texture, and usually firm. Unlike a liquid, gas or plasma. 

  • Hearty; filling. 

  • Written as one word, without spaces or hyphens. 

  • Lacking holes, hollows or admixtures of other materials. 

  • Large in size, quantity, or value. 

  • Of a single color throughout. 

  • Measured as a single solid, as the volumes of individual pieces added together without any gaps. 

  • Excellent, of high quality, or reliable. 

  • Sound; not weak. 

  • United; without division; unanimous. 

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