Synonyms for Flounder:

n.

bloater, bream, dab, brill, coelacanth. be in dire/desperate straits, suffer, bumble, limp, thrive, not know where/which way to turn, be in the grip of something, fumble, undergo, shuffle, bungle, fudge, incur, go through, endure, come under, muddle. misinterpret, not have a clue, lose your grip (on something), have no conception of something, mistake, misconstrue, miss the point, get someone wrong, wallow, move, welter, misunderstand, be unclear about/as to something. contortion, convulsion, fit, flail, contort, fidget, convulse, fidgety, jerk. fish (noun)
carp, fish, blackfish, bass, guppy, fluke, swordfish, pickerel, pike, sunfish, puffer, crappie, catfish, sardine, sole, speckled trout, walleye, whitefish, goby, marlin, bowfin, sturgeon, char, trout, halibut, barracuda, sea horse, rainbow trout, Sting ray, hake, eel, Mudfish, smelt, ray, tarpon, herring, hammerhead, grouper, minnow, salmon, bluegill, goldfish, perch, haddock, sailfish, dogfish, turbot, flatfish, anchovy, lamprey, albacore, tuna, kipper, shark, mackerel, gar.
flounder (noun)
stagger.
struggle (noun)
toss, wallow, hesitate, fumble.

v.

fail (verb)
flop, fail, fall, falter, flunk, lose, bust, blunder, collapse, stumble.
motion (verb)
stagger.
struggle; be in the dark (verb)
flop, fumble, wallow, stumble, blunder, muddle, toss.

Other synonyms:

contort, fidgety, convulsion. bungle, contortion, toss, welter, bumble, fudge. convulse, fidget, limp, fumble, jerk. shuffle. muddle. fit. falter
hesitate.
grovel
wallow.
stumble
stumble.
Other relevant words:
bungle, bloater, contortion, misconstrue, dab, fudge, endure, coelacanth, convulsion, brill, misinterpret, mistake, muddle, flail, fidget, misunderstand, contort, welter, wallow, thrive, toss, fumble, incur, limp, fit, shuffle, hesitate, fidgety, jerk, suffer, convulse, undergo, bream, bumble, stagger, move.

Usage examples for flounder

  1. And then, finally, Mr. Diston persuaded Dean Drone to come, and as soon as Mr. Smith and Alphonse saw him they landed him with a fried flounder that even the apostles would have appreciated. – Sunshine Sketches of a Little Town by Stephen Leacock
  2. " Come," said the Fisherman, " there is no need for so many words about it-- a fish that can talk I should certainly let go, anyhow," with that he put him back again into the clear water, and the Flounder went to the bottom, leaving a long streak of blood behind him. – Household Tales by Brothers Grimm by Grimm Brothers
  3. " Well," said the wife, " if you won't be King, I will; go to the Flounder for I will be King." – Household Tales by Brothers Grimm by Grimm Brothers