WordNet (r) 3.0 (2006):

hookworm
    n 1: parasitic bloodsucking roundworms having hooked mouth parts
         to fasten to the intestinal wall of human and other hosts
    2: infestation of the intestines by hookworms which enter the
       body (usually) through the skin [syn: hookworm, hookworm
       disease]

Moby Thesaurus II by Grady Ward, 1.0:

127 Moby Thesaurus words for "hookworm":
   African lethargy, Asiatic cholera, Chagres fever, German measles,
   Haverhill fever, acute articular rheumatism, ague, alkali disease,
   amebiasis, amebic dysentery, anthrax, bacillary dysentery,
   bastard measles, black death, black fever, blackwater fever,
   breakbone fever, brucellosis, bubonic plague, cachectic fever,
   cerebral rheumatism, chicken pox, cholera, cowpox, dandy fever,
   deer fly fever, dengue, dengue fever, diphtheria, dumdum fever,
   dysentery, elephantiasis, encephalitis lethargica, enteric fever,
   erysipelas, famine fever, five-day fever, flu, frambesia,
   glandular fever, grippe, hansenosis, hepatitis, herpes,
   herpes simplex, herpes zoster, histoplasmosis, hydrophobia,
   infantile paralysis, infectious mononucleosis,
   inflammatory rheumatism, influenza, jail fever, jungle rot,
   kala azar, kissing disease, lepra, leprosy, leptospirosis, loa loa,
   loaiasis, lockjaw, madness, malaria, malarial fever, marsh fever,
   measles, meningitis, milzbrand, mumps, ornithosis, osteomyelitis,
   paratyphoid fever, parotitis, parrot fever, pertussis, pneumonia,
   polio, poliomyelitis, polyarthritis rheumatism, ponos, psittacosis,
   rabbit fever, rabies, rat-bite fever, relapsing fever,
   rheumatic fever, rickettsialpox, ringworm, rubella, rubeola,
   scarlatina, scarlet fever, schistosomiasis, septic sore throat,
   shingles, sleeping sickness, sleepy sickness, smallpox,
   snail fever, splenic fever, spotted fever, strep throat,
   swamp fever, tetanus, thrush, tinea, trench fever, trench mouth,
   tuberculosis, tularemia, typhoid, typhoid fever, typhus,
   typhus fever, undulant fever, vaccinia, varicella, variola,
   venereal disease, viral dysentery, whooping cough, yaws,
   yellow fever, yellow jack, zona, zoster