THESAURUS
thicken
add to, aggrandize, amplify, augment, beat up, boost, broaden, build, build up, cake, candy, churn, clabber, clot, clump, cluster, coagulate, colloid, colloidize, concrete, condense, congeal, cream, crystallize, curd, curdle, emulsify, emulsionize, enlarge, exalt, expand, extend, fatten, fill out, firm up, gel, gelatinate, gelatinize, granulate, grow thick, harden, hike, hike up, incrassate, increase, inflate, inspissate, jack up, jell, jellify, jelly, jump up, knot, lengthen, lopper, lump, maximize, parlay, put up, pyramid, raise, set, solidify, stiffen, take a set, thick, up, whip
ROGET THESAURUS
thicken
Thickness,
VB
be broad, become broad, render broad, expand,
thicken, widen, calibrate.
Density
VB
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.
Semiliquidity
VB
inspissate, incrassate,
thicken, mash, squash, churn, beat up, sinter.