Constancy

n.	1.	The state or quality of being constant or steadfast; freedom from change; stability; fixedness; immutability; as, the constancy of God in his nature and attributes.
	2.	Fixedness or firmness of mind; persevering resolution; especially, firmness of mind under sufferings, steadiness in attachments, or perseverance in enterprise; stability; fidelity. A fellow of plain uncoined constancy. - Shak. Constancy and contempt of danger. - Prescott.

Noun	1.	constancy - the quality of being free from change or variation Synonyms: stability Antonyms: changefulness, inconstancy - the quality of being changeable and variable
	2.	constancy - the tendency for perceived objects to give rise to very similar perceptual experiences in spite of wide variations in the conditions of observation
	3.	constancy - faithfulness in personal attachment (especially sexual fidelity)

abidingness, accordance, adherence, adhesion, age, allegiance, antiquity, aplomb, application, assiduity, assiduousness, attachment, balance, balanced personality, bona fides, bond, bonne foi, bulldog tenacity, calm, ceaselessness, changelessness, chattering, clockwork regularity, coeternity, commitment, concentration, consecutiveness, consistency, consonance, constant flow, continualness, continuance, continuity, continuousness, cool, correspondence, daily round, dedication, defeat of time, defiance of time, devotedness, diligence, dingdong, diuturnity, dogged perseverance, doggedness, drone, durability, durableness, duration, endlessness, endurance, engrossment, equability, equanimity, equilibrium, eternalness, eternity, even pace, even tenor, evenness, ever-duringness, everlastingness, everness, faith, fastness, fealty, featurelessness, fidelity, firmness, firmness of mind, fixedness, flintiness, foreverness, frozenness, fullness, gaplessness, good faith, hardening, homage, homeostasis, homogeneity, immobility, immovability, immovableness, immutability, imperturbability, incessancy, indefatigability, indestructibility, industriousness, industry, infinite duration, infinity, inflexibility, insistence, insistency, interminability, invariability, invariableness, inveteracy, jointlessness, lastingness, long standing, long-lastingness, long-livedness, longevity, loyalty, maintenance, methodicalness, monolithism, monologue, monotone, monotonousness, monotony, nerve, never-endingness, noninterruption, obstinacy, orderliness, oscillation, patience, patience of Job, perdurability, perennation, perenniality, perennialness, permanence, permanency, perpetualness, perpetuity, perseverance, persistence, persistency, pertinaciousness, pertinacity, plenitude, plodding, plugging, preoccupation, pulsation, punctuality, quick fire, quiescence, rapid fire, rapid recurrence, rapid succession, rapidity, regularity, relentlessness, reliability, repetition, resolution, rigidity, rootedness, sameliness, sameness, sang-froid, seamlessness, secureness, security, sedulity, sedulousness, sempiternity, settledness, single-mindedness, singleness of purpose, singsong, slogging, smoothness, solidity, soundness, stability, stable equilibrium, stable state, staccato, stamina, standing, stasis, staunchness, staying power, steadfastness, steadiness, steady nerves, steady state, steeliness, stick-to-itiveness, stubbornness, stuttering, substantiality, successiveness, survival, survivance, sustainment, systematicalness, tattoo, tenaciousness, tenacity, tie, timelessness, tirelessness, torpor, treadmill, tried-and-trueness, triedness, troth, true blue, trueness, unbrokenness, unceasingness, unchangeability, unchangingness, undeflectability, undeviation, undifferentiation, uniformity, unintermission, unintermittedness, uninterruptedness, uninterruption, unity, unrelievedness, unremittingness, unruffledness, unshakable nerves, unshakableness, unswerving attention, unvariation, unyieldingness, vibration