is a specific kind of: condition, status.

is a broader term that covers: dehydration, desiccation | drought, drouth | aridity, aridness, thirstiness | sereness | conjunctivitis arida, xeroma, xerophthalmia, xerophthalmus | dry mouth, xerostomia.

is the opposite of: wetness.

derivation: dry | dry | dry | arid, waterless | dry | dry.