is a specific kind of: deficiency, inadequacy, insufficiency.

is a broader term that covers: wateriness | abstemiousness | spareness, sparseness, sparsity, thinness.

derivation: meager, meagerly, meagre, scrimpy, stingy | bare, scanty, spare | exiguous | lean | poor | lean | inadequate, jejune, poor, short | lean, skimpy | light, scant, short.