Here's what rhymes with pneumothorax.

Consider these alternatives

effusion / conclusion misdiagnosis / diagnosis ulceration / operation epididymitis / cpididymitis hypopituitarism / given ascites / needs hydrocele / feel candidiasis / polyendocrinopathycandidiasis cellulitis / diverticulitis dysmenorrhea / idea hyperkeratosis / tuberculosis discoloration / operation percutaneous / cutaneous cavitation / situation purulent / nonpurulent histoplasmosis / tuberculosis osteonecrosis / diagnosis hemifacial / racial actuation / operation cystitis / religious effusions / institutions peritoneal / feel defecation / information hydronephrosis / diagnosis stressor / ever