Synonyms for Fat:

adj.

containing an oily substance (adjective)
adipose, greasy, suety, fatty, oleaginous.
dumpy (adjective)
podgy.
heavy (adjective)
weighty.
obese (adjective)
chubby, beefy, pudgy, stocky, corpulent, fleshy, rotund, obese, plump, paunchy, heavy-set, portly, stout.
oleaginous (adjective)
suety.
overweight (adjective)
bulky, fleshy, obese, plump, husky, portly, corpulent, pudgy, solid, beefy, chunky, thickset, meaty, heavyset, lard, swollen, porcine, stout, heavy, large, burly, broad, ponderous, weighty, brawny, big, rotund, paunchy, plumpish, roly-poly, potbellied, dumpy, hefty, gross.
productive, rich (adjective)
fertile, profitable, fruitful.
roly-poly (adjective)
plumpish.
thick (adjective)
blubbery.

n.

albumin, carbohydrate, butterfat, additive, caffeine, broad, aspartame, ascorbic acid, coloring, curd, colouring. flesh, mucus, pigment, mucous membrane, matrix, melanin, tissue, connective tissue. excess, glut, overflow, overage, overmuch, beer gut, gut, beer belly, flab, middle-aged spread, oversupply, double chin, baby fat, overstock, superfluity, cellulite, surplusage, love handles, surplus, overrun. big bucks, wealth, pile, windfall, big money, mint, fortune, Payout, megabucks. ghee, palm oil, monounsaturated, olive oil, hydrogenated, margarine, extra virgin, copra. adipose tissue (noun)
suet.
chat (noun)
confer, talk, gossip.
fat (noun)
chubby, stout, rich, oily, rounded, fatty, jowly, fatness, plump out, compact, corpulent, abdominous, fill out, greasy, heavyset, fatty tissue, buttery, fruitful, fertile, avoirdupois, fleshy, plump, profitable, podgy, juicy, gross, flesh out, adipose tissue, potbellied, thickset, oleaginous, thick, loose-jowled, fattish, rotund, portly, dumpy, pyknic, obese, tubby, productive, endomorphic, blubbery, porcine, buxom, weighty, heavy, double-chinned, stocky, zaftig, paunchy, embonpoint, sebaceous, fatten out, adipose, fatten up, fatten, overweight, blubber, pudgy, zoftig, suety, superfatted.
oil (noun)
grease, petroleum, margerine, oil, balm, unguent, crude, butter, lard, lubrication.
overweight, adipose tissue (noun)
cellulite, overflow, flesh, blubber, grease, flab, fatness, excess, suet, surplus, superfluity.

v.

consumption (verb)
plump out, flesh out, plump, fatten up, fatten out, fill out, fatten.

Other synonyms:

melanin, middle-aged spread, paper thin, margarine, mucous membrane, oversupply, overage, roly-poly, ghee, cellulite, hairline, olive oil, copra, flab, hydrogenated, meaty, plumpish, beer gut, baby fat, connective tissue, palm oil, monounsaturated, pigment, double chin, tissue, mucus, flesh, extra virgin, love handles, beer belly, large. matrix. across. overrun, excess. adipose tissue
suet, adipose tissue.
cry
blubber.
fat
lumpish, big.
flaccid
flabby.
husky
burly.
massive
bulky.
stocky
chunky.

Usage examples for fat

  1. " How fat she is! – John Halifax, Gentleman by Dinah Maria Mulock Craik
  2. But had not other girls done the same thing, and lived through it all, and become fat indifferent, and fond of the world? – The Eustace Diamonds by Anthony Trollope
  3. He said to Noll casually, one day: " The 'gris will make this a fat cruise, sir." – The Sea Bride by Ben Ames Williams