Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.

Class III. Words Relating to Matter
Section II. Inorganic Matter
1. Solid Matter

321. Density.

   NOUN:DENSITY, solidity; solidness &c. adj.; impenetrability, impermeability; incompressibility; imporosity; cohesion [See Coherence]; costiveness, constipation, consistence, spissitude.
  specific gravity; hydrometer, areometer.
  CONDENSATION; caseation; solidation [obs.], solidification, consolidation, concretion, coagulation; petrifaction (hardening) [See Hardness]; crystallinity, crystallizability, crystallization, precipitation; deposit, precipitate; inspissation; incrassation, crassitude; thickening &c. v.
  INDIVISIBILITY, indiscerptibility, indissolvableness [rare], infrangibility, infrangibleness, indissolubility, indissolubleness.
  SOLID BODY, mass, block, knot, lump; concretion, concrete, conglomerate; cake, stone, bone, gristle, cartilage.
  CLOT, coagulum, casein, crassament [obs.], crassamentum, legumin, curd; clabber, bonnyclabber, clotted cream, Devonshire cream, grume.
  SEDIMENT, lees, dregs, settlings.
   VERB:BE DENSE &c. adj.; become or render solid &c. adj.; solidify, solidate; concrete, set, take a set, consolidate, congeal, coagulate; curd, curdle, cruddle [dial.], lopper; fix, clot, cake, candy, precipitate, deposit, cohere, crystallize; petrify (harden) [See Hardness].
  CONDENSE, thicken, inspissate, incrassate.
  COMPRESS, squeeze, ram down, constipate [rare].
   ADJECTIVE:DENSE, solid; solidified &c. v.; caseate, caseous; pucka or pakka [Hind.], coherent, cohesive [See Coherence]; compact, close, serried, thickset; substantial, massive, lumpish; impenetrable, impermeable, imporous; incompressible; constipated, costive; crass, spiss [obs.], clabber, kern [chiefly dial.]; concrete (hard) [See Hardness]; knotted, knotty; gnarled; crystallitic, crystalline, crystallizable; thick, grumose, grumous, stuffy.
  UNDISSOLVED, unmelted, unliquefied, unthawed.
  INDIVISIBLE, indiscerptible, infrangible, indissolvable [rare], indissoluble, insoluble, infusible.
   QUOTATION:O, that this too too solid flesh would melt.—Hamlet