1 Often, swell out or up. grow, increase, enlarge, expand, blow or puff up or out, distend, inflate, dilate, wax; mushroom, belly, balloon, bloat, bulge, billow, fatten, rise, tumefy:
After cooking, the mixture swells to twice its original volume.
2 grow, increase, mushroom, snowball, accumulate, mount:
Forgotten for years, her savings had swelled to become a small fortune.
3 increase, raise, augment, enlarge, boost, step up:
Something must be done to swell the number of recruits.
4 enlargement, broadening, increase, extension, spread, swelling, inflation, expansion, rise, surge:
Have you noted the swell in popularity of health foods?
5 wave, surge, billow:
As we rose to the top of each swell, we could see the shore.
6 fop, dandy, gay blade, fashion plate, Beau Brummell, Archaic coxcomb, Historical macaroni, Colloq clothes-horse, US fancy Dan, Slang nob, Archaic lounge lizard, Brit toff:
He frequented the clubs populated by the other London swells.
7 smart, chic, stylish, fashionable, modish, grand, luxurious, de luxe, elegant, first-rate, first-class, top-grade, Colloq posh, swank, swanky, ritzy:
Charlie always took Diane to the swellest places.
8 marvellous, thrilling, splendid, spectacular, first-rate, fine, Colloq great, super, terrific:
I really had a swell time at your party.