dryness vs xeroma

dryness and xeroma both are nouns.

Word	Noun	Adjective	Verb	Adverb
dryness	Yes	No	No	No
xeroma	Yes	No	No	No

As nouns, xeroma is a hyponym of dryness; that is, xeroma is a word with a more specific, narrower meaning than dryness:

dryness: the condition of not containing or being covered by a liquid (especially water)
xeroma: abnormal dryness of the conjunctiva and cornea of the eyes; may be due to a systemic deficiency of vitamin A

dryness (noun)	xeroma (noun)
objectivity and detachment	abnormal dryness of the conjunctiva and cornea of the eyes; may be due to a systemic deficiency of vitamin A
moderation in or abstinence from alcohol or other drugs
the condition of not containing or being covered by a liquid (especially water)