The Collaborative International Dictionary of English v.0.48:

Laryngitis \Lar`yn*gi"tis\, n. [NL. See Larynx, and -tis.]
   (Med.)
   Inflammation of the larynx.
   [1913 Webster]

WordNet (r) 3.0 (2006):

laryngitis
    n 1: inflammation of the mucous membrane of the larynx;
         characterized by hoarseness or loss of voice and coughing

Moby Thesaurus II by Grady Ward, 1.0:

189 Moby Thesaurus words for "laryngitis":
   Asiatic flu, Hong Kong flu, acute bronchitis, adenoiditis,
   adrenitis, aluminosis, amygdalitis, anthracosilicosis, anthracosis,
   appendicitis, arteritis, arthritis deformans, arthritis fungosa,
   arthritis pauperum, asbestosis, asthma, atrophic arthritis,
   atrophic inflammation, atypical pneumonia, bituminosis, black lung,
   blennorrhagic arthritis, brain fever, bronchial pneumonia,
   bronchiectasis, bronchiolitis, bronchitis, bronchopneumonia,
   bunion, bursitis, capillaritis, carditis, catarrh,
   catarrhal inflammation, cerebellitis, cerebral meningitis,
   cerebritis, cerebrospinal meningitis, chalicosis,
   chronic bronchitis, chronic infectious arthritis,
   chronic inflammation, cirrhotic inflammation, climactic arthritis,
   clitoritis, cold, colitis, collagen disease, collapsed lung,
   common cold, coniosis, conjunctivitis, coryza, croup,
   croupous pneumonia, cystitis, degenerative arthritis,
   diffuse inflammation, double pneumonia, dry pleurisy, emphysema,
   empyema, encephalitis, endocarditis, enteritis,
   epidemic pleurodynia, equine encephalomyelitis,
   exudative inflammation, fibrinous pneumonia, fibroid inflammation,
   flu, focal inflammation, gastritis, gingivitis, glossitis,
   gonococcal arthritis, gonorrheal arthritis, gonorrheal rheumatism,
   gout, gouty arthritis, grippe, hay fever, hemophilic arthritis,
   hepatitis, hyperplastic inflammation, hypertrophic arthritis,
   hypertrophic inflammation, infectional arthritis,
   infectious hepatitis, inflammation, influenza,
   irritable bowel syndrome, la grippe, lipoid pneumonia,
   lobar pneumonia, lumbago, lumbar rheumatism, lung cancer,
   lung fever, mastoiditis, meningitis, menopausal arthritis,
   metastatic inflammation, metritis, milk leg, mucous colitis,
   mumps meningitis, myelitis, necrotic inflammation, nephritis,
   neuritis, obliterative inflammation, ophthalitis, ophthalmia,
   orchitis, osseous rheumatism, osteitis, osteoarthritis,
   osteomyelitis, otitis, ovaritis, paradental pyorrhea, penitis,
   pericarditis, periodontitis, peritonitis, pharyngitis, phlebitis,
   pleurisy, pleuritis, pneumococcal pneumonia, pneumoconiosis,
   pneumonia, pneumonic fever, pneumothorax, podagra,
   proliferative arthritis, prostatitis, pyonephritis, pyorrhea,
   pyorrhea alveolaris, quinsy, reactive inflammation, rheum,
   rheumatism, rheumatiz, rheumatoid arthritis, rhinitis,
   sclerosing inflammation, seroplastic inflammation,
   serous inflammation, serum hepatitis, siderosis, silicosis,
   simple inflammation, sinusitis, sore throat, spastic colon,
   specific inflammation, subacute rheumatism, suppurative arthritis,
   suppurative inflammation, swine flu, syphilitic arthritis,
   tennis elbow, testitis, the sniffles, the snuffles,
   thrombophlebitis, tonsilitis, torticollis, toxic inflammation,
   traumatic inflammation, tuberculous arthritis,
   tuberculous rheumatism, ulcerative colitis, uratic arthritis,
   ureteritis, urethral arthritis, urethritis, uteritis, vaginitis,
   vertebral arthritis, virus pneumonia, visceral rheumatism,
   vulvitis, wet pleurisy, whooping cough, wryneck