ROGET'S THESAURUS OF ENGLISH WORDS AND PHRASES ...

321. Density -- N. density, solidity; solidness &c adj.; impenetrability, impermeability;
incompressibility; imporosity † ; cohesion &c 46; constipation, consistence, spissitude † .
specific gravity; hydrometer, areometer † .
condensation; caseation † ; solidation † , solidification; consolidation; concretion,
coagulation; petrification &c (hardening) 323; crystallization, precipitation; deposit,
precipitate; inspissation † ; gelation, thickening &c v.. 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 &c adj.; become solid, render solid &c adj.; solidify, solidate † ; concrete, set,
take a set, consolidate, congeal, coagulate; curd, curdle; lopper; fix, clot, cake, candy,
precipitate, deposit, cohere, crystallize; petrify &c (harden) 323.
condense, thicken, gel, inspissate † , incrassate † ; compress, squeeze, ram down,
constipate.
Adj. dense, solid; solidified &c v.; caseous; pukka † ; coherent, cohesive &c 46; compact,
close, serried, thickset; substantial, massive, lumpish † ; impenetrable, impermeable,
nonporous, imporous † ; incompressible; constipated; concrete &c (hard) 323; knotted,
knotty; gnarled; crystalline, crystallizable; thick, grumous † , stuffy.
undissolved, unmelted † , unliquefied † , unthawed † .
indivisible, indiscerptible † , infrangible † , indissolvable † , indissoluble, insoluble,
infusible.
322. Rarity -- N. rarity, tenuity; absence of solidity &c 321; subtility † ; subtilty † , subtlety;
sponginess, compressibility.
rarefaction, expansion, dilatation, inflation, subtilization † .
vaporization, evaporation, diffusion, gassification † .
ether &c (gas) 334.
V. rarefy, expand, dilate, subtilize † .
Adj. rare, subtile, thin, fine, tenuous, compressible, flimsy, slight; light &c 320;
cavernous, spongy &c (hollow) 252.
rarefied &c v.; unsubstantial; uncompact † , incompressed † ; rarefiable † .
323. Hardness -- N. hardness &c adj.; rigidity; renitence † , renitency; inflexibility,
temper, callosity, durity † .
induration, petrifaction; lapidification † , lapidescence † ; vitrification, ossification;
crystallization.
stone, pebble, flint, marble, rock, fossil, crag, crystal, quartz, granite, adamant; bone,
cartilage; hardware; heart of oak, block, board, deal board; iron, steel; cast iron,
decarbonized iron, wrought iron; nail; brick, concrete; cement.
V. render hard &c adj.; harden, stiffen, indurate, petrify, temper, ossify, vitrify; accrust † .
Adj. hard, rigid, stubborn, stiff, firm; starch, starched; stark, unbending, unlimber,
unyielding; inflexible, tense; indurate, indurated; gritty, proof.
adamant, adamantine, adamantean † ; concrete, stony, granitic, calculous, lithic † ,
vitreous; horny, corneous † ; bony; osseous, ossific † ; cartilaginous; hard as a rock &c n.;
stiff as buckram, stiff as a poker; stiff as starch, stiff as as board.