pyorrhea alveolaris vs Riggs' disease

pyorrhea alveolaris and Riggs' disease both are nouns.

Word	Noun	Adjective	Verb	Adverb
pyorrhea alveolaris	Yes	No	No	No
Riggs' disease	Yes	No	No	No

As nouns, pyorrhea alveolaris and Riggs' disease are synonyms defined as:

pyorrhea alveolaris and Riggs' disease: chronic periodontitis; purulent inflammation of the teeth sockets

Other synonyms of pyorrhea alveolaris include pyorrhea, pyorrhoea.

pyorrhea alveolaris (noun)	Riggs' disease (noun)
chronic periodontitis; purulent inflammation of the teeth sockets	chronic periodontitis; purulent inflammation of the teeth sockets