An untrained person who pretends to be a physician and who dispenses medical advice.

Roget 548: deceiver etc. (deceive) etc. 545; dissembler, hypocrite; sophist, Pharisee, Jesuit, Mawworm^†, Pecksniff, Joseph Surface, Tartufe^†, Janus; serpent, snake in the grass, cockatrice, Judas, wolf in sheep's clothing; jilt; shuffler^†, stool pigeon.    liar etc. (lie) etc. 544; story-teller, perjurer, false witness, menteur a triple etage [Fr.], Scapin^†; bunko steerer [U.S.], carpetbagger [U.S.], capper [U.S.], faker, fraud, four flusher [Slang], horse coper^†, ringer [Slang], spieler^†, straw bidder [U.S.].    imposter, pretender, soi-disant [Fr.], humbug; adventurer; Cagliostro, Fernam Mendez Pinto; ass in lion's skin etc. (bungler) 701; actor etc. (stage player) 599.    quack, charlatan, mountebank, saltimbanco^†, saltimbanque^†, empiric, quacksalver, medicaster^†, Rosicrucian, gypsy; man of straw.    conjuror, juggler, trickster, prestidigitator, jockey; crimp, decoy, decoy duck; rogue, knave, cheat; swindler etc. (thief) 792; jobber.    ... show more

Roget 662: remedy, help, cure, redress; medicine, medicament; diagnosis, medical examination; medical treatment; surgery; preventive medicine.    [medical devices] clinical thermometer, stethoscope, X-ray machine.    anthelmintic [Med.]; antidote, antifebrile [Med.], antipoison^†, counterpoison^†, antitoxin, antispasmodic; bracer, faith cure, placebo; helminthagogue^†, lithagogue^†, pick-meup, stimulant, tonic; vermifuge, prophylactic, corrective, restorative; sedative etc. 174; palliative; febrifuge; alterant^†, alterative; specific; antiseptic, emetic, analgesic, pain-killer, antitussive [Med.], antiinflammatory [Med.], antibiotic, antiviral [Med.], antifungal [Med.], carminative; Nepenthe, Mithridate.    cure, treatment, regimen; radical cure, perfect cure, certain cure; sovereign remedy.    examination, diagnosis, diagnostics; analysis, urinalysis, biopsy, radiology.    medicine, physic, Galenicals^†, simples, drug, pharmaceutical, prescription, potion, draught, dose, pill, bolus, injection, infusion, drip, suppository, electuary^†; linctus^†, lincture^†; medicament; pharmacon^†.    nostrum, receipt, recipe, prescription; catholicon^†, panacea, elixir, elixir vitae, philosopher's stone; balm, balsam, cordial, theriac^†, ptisan^†.    agueweed^†, arnica, benzoin, bitartrate of potash, boneset^†, calomel, catnip, cinchona, cream of tartar, Epsom salts [Chem]; feverroot^†, feverwort; friar's balsam, Indian sage; ipecac, ipecacuanha; jonquil, mercurous chloride, Peruvian bark; quinine, quinquina^†; sassafras, yarrow.    salve, ointment, cerate, oil, lenitive, lotion, cosmetic; plaster; epithem^†, embrocation^†, liniment, cataplasm^†, sinapism^†, arquebusade^†, traumatic, vulnerary, pepastic^†, poultice, collyrium^†, depilatory; emplastrum^†; eyewater^†, vesicant, vesicatory [Med.].    compress, pledget^†; bandage etc. (support) 215.    treatment, medical treatment, regimen; dietary, dietetics; vis medicatrix^†, vis medicatrix naturae [Lat.]; medecine expectante [Fr.]; bloodletting, bleeding, venesection [Med.], phlebotomy, cupping, sanguisae, leeches; operation, surgical operation; transfusion, infusion, intravenous infusion, catheter, feeding tube; prevention, preventative medicine, immunization, inoculation, vaccination, vaccine, shot, booster, gamma globulin.    pharmacy, pharmacology, pharmaceutics; pharmacopoeia, formulary; acology^†, Materia Medica [Lat.], therapeutics, posology^†; homeopathy, allopathy^†, heteropathy [Med.], osteopathy, hydropathy [Med.]; cold water cure; dietetics; surgery, chirurgery [Med.], chirurgy^†; healing art, leechcraft^†; orthopedics, orthopedy^†, orthopraxy^†; pediatrics; dentistry, midwifery, obstetrics, gynecology; tocology^†; sarcology^†.    hospital, infirmary; pesthouse^†, lazarhouse^†; lazaretto; lock hospital; maison de sante [Fr.]; ambulance.    dispensary; dispensatory^†, drug store, pharmacy, apothecary, druggist, chemist.    Hotel des Invalides; sanatorium, spa, pump room, well; hospice; Red Cross.    doctor, physician, surgeon; medical practitioner, general practitioner, specialist; medical attendant, apothecary, druggist; leech; osteopath, osteopathist^†; optometrist, ophthalmologist; internist, oncologist, gastroenterologist; epidemiologist [Med.], public health specialist; dermatologist; podiatrist; witch doctor, shaman, faith healer, quack, exorcist; Aesculapius^†, Hippocrates, Galen; accoucheur [Fr.], accoucheuse [Fr.], midwife, oculist, aurist^†; operator; nurse, registered nurse, practical nurse, monthly nurse, sister; nurse's aide, candystriper; dresser; bonesetter; pharmaceutist^†, pharmacist, druggist, chemist, pharmacopolist^†.    ... show more

Roget 701: bungler; blunderer, blunderhead^†; marplot, fumbler, lubber, duffer, dauber, stick; bad hand, poor hand, poor shot; butterfingers^†.    no conjurer, flat, muff, slow coach, looby^†, lubber, swab; clod, yokel, awkward squad, blanc-bec; galoot^†.    land lubber; fresh water sailor, fair weather sailor; horse marine; fish out of water, ass in lion's skin, jackdaw in peacock's feathers; quack etc. (deceiver) 548; lord of misrule.    sloven, slattern, trapes^†.    amateur, novice, greenhorn (learner) 541.    ... show more

Dutch: kakadoris, kwakzalver
Polish: szarlatan

The harsh sound of a duck.

Dutch: kwak, gekwaak, gekwek
Polish: kwakanie, kwak

Utter quacking noises.

Roget 412: cry, roar, bellow, blare, rebellow^†; growl, snarl.    [specific animal sounds] bark [dog, seal]; bow-wow, yelp [dog]; bay, bay at the moon [dog, wolf]; yap, yip, yipe, growl, yarr^†, yawl, snarl, howl [dog, wolf]; grunt, gruntle^†; snort [pig, hog, swine, horse]; squeak, [swine, mouse]; neigh, whinny [horse]; bray [donkey, mule, hinny, ass]; mew, mewl [kitten]; meow [cat]; purr [cat]; caterwaul, pule [cats]; baa^†, bleat [lamb]; low, moo [cow, cattle]; troat^†, croak, peep [frog]; coo [dove, pigeon]; gobble [turkeys]; quack [duck]; honk, gaggle, guggle [goose]; crow, caw, squawk, screech, [crow]; cackle, cluck, clack [hen, rooster, poultry]; chuck, chuckle; hoot, hoo [owl]; chirp, cheep, chirrup, twitter, cuckoo, warble, trill, tweet, pipe, whistle [small birds]; hum [insects, hummingbird]; buzz [flying insects, bugs]; hiss [snakes, geese]; blatter^†; ratatat [woodpecker].    ... show more

Act as a medical quack or a charlatan.

Dutch: kwakzalveren, kwakzalver

Medically unqualified.