-itis

(Greek: a suffix; inflammation, burning sensation; by extension, disease associated with inflammation)

This suffix has come to mean "inflammation of" but originally it meant "pertaining to" or "of the". The Greek word nosos ["disease"] was either expressed or understood, although it might not be included with the basic element. For example, bursitis nosos would mean "disease of the bursa".

rhinitis (s) ((s) (noun), rhinitides (pl)
The inflammation of the nasal mucous membrane which lines the nose: A rhinitis is usually manifested by some combination of nasal obstruction, nasal discharge, sneezing, and facial pressure or pain.
salpingitis (s) (noun), salpingitides (pl)
Inflammation of a fallopian tube (the tube that goes from the ovary to the top of the uterus): "Salpingitis is usually caused by an infection which spreads upward from the vagina (muscular passage which forms part of the female reproductive system), cervix (the neck and outlet of the uterus), and the uterus (the hollow, muscular organ of the female reproductive system in which the fertilized ovum [egg] normally becomes embedded and in which the developing embryo [unborn child during the first eight weeks of development] and the fetus [the unborn child from the end of the eighth week after fertilization until birth] is nourished and grows)."
salpingo-oophoritis (s) (noun), salpingo-oophoritides (pl)
sialadenitis, sialoadenitis
Inflammation of a salivary gland or glands; also, sialitis.

Chronic nonspecific sialadenitis consists of a chronic inflammatory swelling of a major salivary gland, often characterized by recurrent exacerbations. It is sometimes the result of infection secondary to duct obstruction, for instance by a calculus.

sialoangitis, sialoangiitis
Inflammation of the salivary ducts.
sinusitis (s) (noun), sinusitises (pl)
An inflammation of the sinuses, or a sinus; especially, in the nasal region: Common symptoms include thick nasal mucus, a plugged nose, and facial pain: Other forms of sinusitis may include fever, headaches, a poor sense of smell, a sore throat, and coughs.
spermatocystitis
sphenoiditis
splenitis
spondylitis
staphylitis
Inflammation of the uvula (small piece of soft tissue that can be seen dangling down from the soft palate over the back of the tongue).
steatitis
1. Inflammation of adipose (fat) tissue.
2. An inflammation of fat tissue in certain animals such as swine, horses, cats, and chickens. It is one of the manifestations of vitamin E-selenium deficiency disease in these animals. "Yellow fat disease" is the more popular name for this disease.
stomatitis
streptodermatitis
syndesmitis
Inflammation of a ligament or ligaments.