dry mouth vs xerotes

dry mouth and xerotes both are nouns.

Word	Noun	Adjective	Verb	Adverb
dry mouth	Yes	No	No	No
xerotes	Yes	No	No	No

As nouns, xerotes is a hypernym of dry mouth; that is, xerotes is a word with a broader meaning than dry mouth:

dry mouth: abnormal dryness of the mouth resulting from decreased secretion of saliva
xerotes: the condition of not containing or being covered by a liquid (especially water)

Other hypernyms of dry mouth include dryness, waterlessness.

dry mouth (noun)	xerotes (noun)
abnormal dryness of the mouth resulting from decreased secretion of saliva	the condition of not containing or being covered by a liquid (especially water)