wholeness

The quality or state of being whole, entire, or sound; entireness; totality; completeness.

noun

1. The state of being entirely whole: completeness, entirety, integrity, oneness, totality. See part/whole.
2. The condition of being free from defects or flaws: durability, firmness, integrity, solidity, soundness, stability, strength. See better/worse.
3. The condition of being physically and mentally sound: haleness, health, healthiness, heartiness, soundness. See health/sickness.

The noun has 2 meanings:

Meaning #1: an unreduced or unbroken completeness or totality
  Synonyms: integrity, unity

Meaning #2: a state of robust good health
  Synonym: haleness