1.  fever(n = noun.state) febricity, febrility, feverishness, pyrexia - a rise in the temperature of the body; frequently a symptom of infection;
is a kind of symptom
has particulars: hyperpyrexia
Derived form adjective feverous₁

2.  fever(n = noun.feeling) - intense nervous anticipation; "in a fever of resentment"
is a kind of anticipation, expectancy
has particulars: buck fever, gold fever

1.  A diseased state of the system, marked by increased heat, acceleration of the pulse, and a general derangement of the functions, including usually, thirst and loss of appetite. Many diseases, of which fever is the most prominent symptom, are denominated fevers; as, typhoid fever; yellow fever. [1913 Webster]
" Remitting fevers subside or abate at intervals; intermitting fevers intermit or entirely cease at intervals; continued or continual fevers neither remit nor intermit." [1913 Webster]

2.  Excessive excitement of the passions in consequence of strong emotion; a condition of great excitement; as, this quarrel has set my blood in a fever. [1913 Webster]
"An envious fever
Of pale and bloodless emulation." [1913 Webster]
"After life's fitful fever he sleeps well." [1913 Webster]

   To put into a fever; to affect with fever; as, a fevered lip. [1913 Webster]
"The white hand of a lady fever thee." [1913 Webster]

fever, n. & v.
--n.
1 a an abnormally high body temperature, often with delirium etc. b a disease characterized by this (scarlet fever; typhoid fever).
2 nervous excitement; agitation.
--v.tr. (esp. as fevered adj.) affect with fever or excitement.

Idiom:
fever pitch a state of extreme excitement.

Etymology:
OE fefor & AF fevre, OF fievre f. L febris

N  disease, illness, sickness, ailing, all the ills that flesh is heir to, morbidity, morbosity, infirmity, ailment, indisposition, complaint, disorder, malady, distemper, distemperature, visitation, attack, seizure, stroke, fit, delicacy, loss of health, invalidation, cachexy, cachexia, atrophy, marasmus, indigestion, dyspepsia, decay, decline, consumption, palsy, paralysis, prostration, taint, pollution, infection, sepsis, septicity, infestation, epidemic, pandemic, endemic, epizootic, murrain, plague, pestilence, pox, sore, ulcer, abscess, fester, boil, pimple, wen, carbuncle, gathering, imposthume, peccant humor, issue, rot, canker, cold sore, fever sore, cancer, carcinoma, leukemia, neoplastic disease, malignancy, tumor, caries, mortification, corruption, gangrene, sphacelus, sphacelation, leprosy, eruption, rash, breaking out, fever, temperature, calenture, inflammation, ague, angina pectoris, appendicitis, Asiatic cholera, spasmodic cholera, biliary calculus, kidney stone, black death, bubonic plague, pneumonic plague, blennorrhagia, blennorrhoea, blood poisoning, bloodstroke, bloody flux, brash, breakbone fever, dengue fever, malarial fever, Q-fever, heart attack, cardiac arrest, cardiomyopathy, hardening of the arteries, arteriosclerosis, atherosclerosis, bronchocele, canker rash, cardialgia, carditis, endocarditis, cholera, asphyxia, chlorosis, chorea, cynanche, dartre, enanthem, enanthema, erysipelas, exanthem, exanthema, gallstone, goiter, gonorrhea, green sickness, grip, grippe, influenza, flu, hay fever, heartburn, heaves, rupture, hernia, hemorrhoids, piles, herpes, itch, king's evil, lockjaw, measles, mumps, polio, necrosis, pertussis, phthisis, pneumonia, psora, pyaemia, pyrosis, quinsy, rachitis, ringworm, rubeola, St. Vitus's dance, scabies, scarlatina, scarlet fever, scrofula, seasickness, struma, syntexis, tetanus, tetter, tonsillitis, tonsilitis, tracheocele, trachoma, trismus, varicella, varicosis, variola, water qualm, whooping cough, yellow fever, yellow jack, fatal disease, dangerous illness, galloping consumption, churchyard cough, general breaking up, break up of the system, idiocy insanity, martyr to disease, cripple, the halt the lame and the blind, valetudinary, valetudinarian, invalid, patient, case, sickroom, sick- chamber, pathology, etiology, nosology, anthrax, bighead, blackleg, blackquarter, cattle plague, glanders, mange, scrapie, milk sickness, heartworm, feline leukemia, roundworms, quarter-evil, quarter-ill, rinderpest, virus, bacterium, bacteria, DNA virus, RNA virus, rhinovirus, rhabdovirus, picornavirus, herpesvirus, cytomegalovirus, CMV, human immunodefficiency virus, HIV, diseased, ailing, ill, ill of, taken ill, seized with, indisposed, unwell, sick, squeamish, poorly, seedy, affected with illness, afflicted with illness, laid up, confined, bedridden, invalided, in hospital, on the sick list, out of health, out of sorts, under the weather, valetudinary, unsound, unhealthy, sickly, morbid, morbose, healthless, infirm, chlorotic, unbraced, drooping, flagging, lame, crippled, halting, morbid, tainted, vitiated, peccant, contaminated, poisoned, tabid, mangy, leprous, cankered, rotten, rotten to the core, rotten at the core, withered, palsied, paralytic, dyspeptic, luetic, pneumonic, pulmonic, phthisic, rachitic, syntectic, syntectical, tabetic, varicose, touched in the wind, broken-winded, spavined, gasping, hors de combat, weakly, weakened, decrepit, decayed, incurable, in declining health, cranky, in a bad way, in danger, prostrate, moribund, morbific epidemic, endemic, zymotic.

N  excitability, impetuosity, vehemence, boisterousness, turbulence, impatience, intolerance, nonendurance, irritability, itching, wincing, disquiet, disquietude, restlessness, fidgets, fidgetiness, agitation, trepidation, perturbation, ruffle, hurry, fuss, flurry, fluster, flutter, pother, stew, ferment, whirl, buck fever, hurry-skurry, thrill, state of excitement, fever of excitement, transport, passion, excitement, flush, heat, fever, heat, fire, flame, fume, blood boiling, tumult, effervescence, ebullition, boiling over, whiff, gust, story, tempest, scene, breaking out, burst, fit, paroxysm, explosion, outbreak, outburst, agony, violence, fierceness, rage, fury, furor, furore, desperation, madness, distraction, raving, delirium, phrensy, frenzy, hysterics, intoxication, tearing passion, raging passion, anger, fascination, infatuation, fanaticism, Quixotism, Quixotry, tete montee, excitable, easily excited, in an excitable state, high-strung, irritable, impatient, intolerant, feverish, febrile, hysterical, delirious, mad, moody, maggoty- headed, unquiet, mercurial, electric, galvanic, hasty, hurried, restless, fidgety, fussy, chafing, startlish, mettlesome, high-mettled, skittish, vehement, demonstrative, violent, wild, furious, fierce, fiery, hot-headed, madcap, overzealous, enthusiastic, impassioned, fanatical, rabid, rampant, clamorous, uproarious, turbulent, tempestuous, tumultuary, boisterous, impulsive, impetuous, passionate, uncontrolled, uncontrollable, ungovernable, irrepressible, stanchless, inextinguishable, burning, simmering, volcanic, ready to burst forth, volatile, excited, exciting, Int, pish!, pshaw!, noli me tangere, filled with fury, rapt, inspir'd, maggiore fretta minore atto.

N  heat, caloric, temperature, warmth, fervor, calidity, incalescence, incandescence, glow, flush, fever, hectic, phlogiston, fire, spark, scintillation, flash, flame, blaze, bonfire, firework, pyrotechnics, pyrotechny, wildfire, sheet of fire, lambent flame, devouring element, adiathermancy, recalescence, summer, dog days, canicular days, baking, heat, white heat, tropical heat, Afric heat, Bengal heat, summer heat, blood heat, sirocco, simoom, broiling sun, insolation, warming, sun, pyrology, thermology, thermotics, thermodynamics, thermometer, calorie, gram-calorie, small calorie, kilocalorie, kilogram calorie, large calorie, British Thermal Unit, B, T, U, therm, quad, degrees Kelvin, kelvins, degrees centigrade, degrees Celsius, degrees Fahrenheit, hot, warm, mild, genial, tepid, lukewarm, unfrozen, thermal, thermic, calorific, fervent, fervid, ardent, aglow, sunny, torrid, tropical, estival, canicular, steamy, close, sultry, stifling, stuffy, suffocating, oppressive, reeking, baking, red hot, white hot, smoking hot, burning, hot, piping hot, like a furnace, like an oven, burning, hot as fire, hot as pepper, hot enough to roast an ox, hot enough to boil an egg, fiery, incandescent, incalescent, candent, ebullient, glowing, smoking, live, on fire, dazzling, in flames, blazing, in a blaze, alight, afire, ablaze, unquenched, unextinguished, smoldering, in a heat, in a glow, in a fever, in a perspiration, in a sweat, sudorific, sweltering, sweltered, blood hot, blood warm, warm as a toast, warm as wool, volcanic, plutonic, igneous, isothermal, isothermic, isotheral, not a breath of air, whirlwinds of tempestuous fire.

argentine hemorrhagic fever, assam fever, blackwater fever, boutonneuse fever, brain fever, breakbone fever, buck fever, canicola fever, catarrhal fever, cerebrospinal fever, chagres fever, childbed fever, chills and fever, crimea-congo hemorrhagic fever, dandy fever, deer fly fever, dengue fever, dumdum fever, ebola fever, ebola hemorrhagic fever, enteric fever, fever blister, fever pitch, fever tree, gibraltar fever, glandular fever, gold fever, haemorrhagic fever, haverhill fever, hay fever, hemorrhagic fever, indian tick fever, jungle fever, kenya fever, lassa fever, lazaret fever, malarial fever, malta fever, marburg hemorrhagic fever, marseilles fever, mediterranean fever, miliary fever, mountain fever, pappataci fever, paratyphoid fever, parrot fever, puerperal fever, q fever, rabbit fever, ratbite fever, ratbite fever bacterium, recurrent fever, relapsing fever, rheumatic fever, rift valley fever, rock fever, rocky mountain spotted fever, sandfly fever, scarlet fever, shipping fever, shoddy fever, spirillum fever, splenic fever, spotted fever, spring fever, swamp fever, texas fever, thermic fever, tick fever, trench fever, typhoid fever, typhus fever, undulant fever, valley fever, viral haemorrhagic fever, viral hemorrhagic fever, yellow fever