pericementoclasia vs pyorrhoea

pericementoclasia and pyorrhoea both are nouns.

Word	Noun	Adjective	Verb	Adverb
pericementoclasia	Yes	No	No	No
pyorrhoea	Yes	No	No	No

As nouns, pyorrhoea is a hypernym of pericementoclasia; that is, pyorrhoea is a word with a broader meaning than pericementoclasia:

pericementoclasia: pus pocket formation around a tooth
pyorrhoea: chronic periodontitis; purulent inflammation of the teeth sockets

Other hypernyms of pericementoclasia include pyorrhea, pyorrhea alveolaris, Riggs' disease.

pericementoclasia (noun)	pyorrhoea (noun)
pus pocket formation around a tooth	discharge of pus
	chronic periodontitis; purulent inflammation of the teeth sockets