pyorrhea alveolaris vs pyorrhoea

pyorrhea alveolaris and pyorrhoea both are nouns.

Word	Noun	Adjective	Verb	Adverb
pyorrhea alveolaris	Yes	No	No	No
pyorrhoea	Yes	No	No	No

As nouns, pyorrhea alveolaris and pyorrhoea are synonyms defined as:

pyorrhea alveolaris and pyorrhoea: chronic periodontitis; purulent inflammation of the teeth sockets

Other synonyms of pyorrhea alveolaris include pyorrhea, Riggs' disease.

pyorrhea alveolaris (noun)	pyorrhoea (noun)
chronic periodontitis; purulent inflammation of the teeth sockets	discharge of pus
	chronic periodontitis; purulent inflammation of the teeth sockets