THESAURUS
dilate
add to, aggrandize, amplify, augment, bag, balloon, belly, belly out, bilge, billow, bloat, blow up, bouge, broaden, bug, build, build up, bulge, bulk, bulk out, crescendo, descant, describe, detail, develop, discuss, dissert, dissertate, distend, elaborate, enlarge, enlarge upon, evolve, expand, expatiate, explicate, extend, fill out, goggle, greaten, hike, hike up, huff, increase, inflate, lengthen, magnify, narrate, particularize, pooch, pop, pouch, pout, prolong, protract, puff, puff up, pump, pump up, raise, rarefy, recite, recount, rehearse, rehearse in extenso, relate, relate at large, round out, sermonize, snowball, stretch, sufflate, swell, swell out, tumefy, unfold, up, widen, work out
ROGET THESAURUS
dilate
Diffuseness
VB
be diffuse, run out on, descant, expatiate, enlarge,
dilate, amplify, expand, inflate, launch out, branch out, rant, maunder, prose, harp upon, dwell on, insist upon, digress, ramble, battre la campagne, beat about the bush, perorate, spin a long yarn, protract, spin out, swell out, draw out, battologize.
Increase
VB
increase, augment, add to, enlarge,
dilate, grow, wax, get ahead, gain strength, advance, run up, shoot up, rise, ascend, sprout, aggrandize, raise, exalt, deepen, heighten, strengthen, intensify, enhance, magnify, redouble, aggravate, exaggerate, exasperate, exacerbate, add fuel to the flame, oleum addere camino, superadd, spread.
Expansion
VB
become larger &c (large), expand, widen, enlarge, extend, grow, increase, incrassate, swell, gather, fill out, deploy, take open order,
dilate, stretch, distend, spread, mantle, wax, grow up, spring up, bud, bourgeon, shoot, sprout, germinate, put forth, vegetate, pullulate, open, burst forth, gain flesh, gather flesh, outgrow, spread like wildfire, overrun, be larger than, surpass, render larger &c (large), expand, spread, extend, aggrandize, distend, develop, amplify, spread out, widen, magnify, rarefy, inflate, puff, blow up, stuff, pad, cram, exaggerate, fatten.
Rarity
VB
rarefy, expand,
dilate, subtilize.