Reiter's syndrome vs Reiter's disease

Reiter's syndrome and Reiter's disease both are nouns.

Word	Noun	Adjective	Verb	Adverb
Reiter's syndrome	Yes	No	No	No
Reiter's disease	Yes	No	No	No

As nouns, Reiter's syndrome and Reiter's disease are synonyms defined as:

Reiter's syndrome and Reiter's disease: an inflammatory syndrome (etiology unknown) predominantly in males; characterized by arthritis and conjunctivitis and urethritis

Reiter's syndrome (noun)	Reiter's disease (noun)
an inflammatory syndrome (etiology unknown) predominantly in males; characterized by arthritis and conjunctivitis and urethritis	an inflammatory syndrome (etiology unknown) predominantly in males; characterized by arthritis and conjunctivitis and urethritis