N. density, solidity, solidness, impenetrability, impermeability, incompressibility, imporosity, cohesion, constipation, consistence, spissitude|, specific gravity, hydrometer, areometer, condensation, caseation, solidation, solidification, consolidation, concretion, coagulation, petrification, crystallization, precipitation, deposit, precipitate, inspissation, gelation, thickening, indivisibility, indiscerptibility, insolubility, indissolvableness, solid body, mass, block, knot, lump, concretion, concrete, conglomerate, cake, clot, stone, curd, coagulum, bone, gristle, cartilage, casein, crassamentum|, legumin, superdense matter, condensed states of matter, dwarf star, neutron star

V. be dense, become solid, render solid, solidify, solidate, concrete, set, take a set, consolidate, congeal, coagulate, curd, curdle, lopper, fix, clot, cake, candy, precipitate, deposit, cohere, crystallize, petrify, condense, thicken, gel, inspissate, incrassate, compress, squeeze, ram down, constipate

Adj. dense, solid, solidified, caseous, pukka, coherent, cohesive, compact, close, serried, thickset, substantial, massive, lumpish, impenetrable, impermeable, nonporous, imporous, incompressible, constipated, concrete, knotted, knotty, gnarled, crystalline, crystallizable, thick, grumous|, stuffy, undissolved, unmelted, unliquefied, unthawed, indivisible, indiscerptible, infrangible, indissolvable, indissoluble, insoluble, infusible