STABILITY
constancy, stability
(noun) the quality of being enduring and free from change or variation; “early mariners relied on the constancy of the trade winds”
stability, stableness
(noun) the quality or attribute of being firm and steadfast
stability
(noun) a stable order (especially of society)
Source: WordNet® 3.1
Etymology
Noun
stability (countable and uncountable, plural stabilities)
The condition of being stable or in equilibrium, and thus resistant to change.
Antonym: instability
The tendency to recover from perturbations.
Source: Wiktionary
Sta*bil"i*ty, n. Etym: [L. stabilitas; cf. F. stabilité. See Stable,
a.]
1. The state or quality of being stable, or firm; steadiness;
firmness; strength to stand without being moved or overthrown; as,
the stability of a structure; the stability of a throne or a
constitution.
2. Steadiness or firmness of character, firmness of resolution or
purpose; the quality opposite to Ant: fickleness, Ant: irresolution,
or Ant: inconstancy; constancy; steadfastness; as, a man of little
stability, or of unusual stability.
3. Fixedness; -- as opposed to Ant: fluidity.
Since fluidness and stability are contary qualities. Boyle.
Syn.
– Steadiness; stableness; constancy; immovability; firmness.
Source: Webster’s Unabridged Dictionary 1913 Edition