Synonyms for Un failing:

• adj.

  •consistent (adjective)
  • expected,
  • of a piece,
  • homogeneous,
  • unvarying,
  • uniform,
  • unchanging,
  • steady,
  • true to type,
  • unfailing,
  • undeviating,
  • even,
  • rational,
  • logical.
  •constant (adjective)
  • attached,
  • persevering,
  • resolute,
  • unshaken,
  • devoted,
  • allegiant,
  • unwavering,
  • dogged,
  • fast,
  • trusty.
  •continual (adjective)
  • dateless,
  • timeless,
  • unwaning,
  • uninterrupted,
  • unceasing,
  • frequent,
  • perpetual,
  • recurrent,
  • around-the-clock,
  • unending,
  • Staying,
  • everlasting,
  • permanent,
  • aeonian,
  • persisting,
  • relentless,
  • oft-repeated,
  • interminable,
  • enduring,
  • unremitting,
  • unbroken,
  • regular,
  • consecutive,
  • repeated,
  • connected,
  • running,
  • repetitive.
  •dependable (adjective)
  • rocklike,
  • tried,
  • always there,
  • good as one's word,
  • secure,
  • certain,
  • to be counted on,
  • stable,
  • sturdy,
  • carrying the load.
  •foolproof (adjective)
  • faultless,
  • tested,
  • flawless,
  • idiot-proof,
  • unassailable,
  • safe,
  • sure-fire,
  • perfect,
  • goofproof,
  • guaranteed,
  • unerring,
  • fail-safe.
  •infallible (adjective)
  • apodictic,
  • inerrant,
  • Undeceivable,
  • satisfying,
  • positive,
  • effective,
  • efficient,
  • foolproof,
  • useful,
  • satisfactory,
  • unimpeachable,
  • correct,
  • efficacious,
  • acceptable,
  • exact,
  • helpful,
  • unquestionable,
  • effectual,
  • authoritative,
  • unbeatable,
  • omniscient,
  • handy,
  • agreeable,
  • impeccable,
  • accurate,
  • inerrable,
  • incontrovertible.
  •invariable (adjective)
  • immovable,
  • unchangeable,
  • undiversified,
  • fixed,
  • changeless,
  • immutable,
  • set,
  • inalterable,
  • inflexible,
  • static,
  • rigid,
  • unmodifiable,
  • unrelieved,
  • unalterable,
  • monotonous.
  •loyal (adjective)
  • believing,
  • true-blue,
  • unswerving,
  • on one's side,
  • dutiful,
  • ardent,
  • coming through,
  • firm,
  • patriotic,
  • behind one.
  •perennial (adjective)
  • incessant,
  • imperishable,
  • sustained,
  • never-ending,
  • perdurable,
  • lasting,
  • long-lasting,
  • yearly,
  • lifelong,
  • longstanding,
  • yearlong,
  • annual,
  • immortal,
  • seasonal,
  • abiding,
  • long-lived,
  • undying,
  • chronic,
  • deathless,
  • inveterate,
  • durable,
  • old.
  •perpetual (adjective)
  • infinite,
  • reoccurring,
  • intermittent,
  • going on,
  • Recurring,
  • returning,
  • repetitious,
  • never-ceasing,
  • without end,
  • sempiternal,
  • continued,
  • repeating,
  • perennial.
  •reliable (adjective)
  • decent,
  • responsible,
  • True-hearted,
  • sterling,
  • sincere,
  • determined,
  • honest,
  • incorrupt,
  • veracious,
  • sound,
  • unequivocal,
  • definite,
  • high-principled,
  • candid,
  • honorable,
  • predictable,
  • upright,
  • good,
  • decisive,
  • strong,
  • righteous,
  • okay,
  • conscientious,
  • proved,
  • careful,
  • respectable,
  • reputable.
  •round-the-clock (adjective)
  • ongoing,
  • nonstop.
  •same (adjective)
  • unchanged,
  • unaltered.
  •sure (adjective)
  • clear,
  • irrevocable,
  • decided,
  • indisputable,
  • telling,
  • unqualified,
  • convinced,
  • ineluctable,
  • assured,
  • unavoidable,
  • satisfied,
  • inescapable,
  • doubtless,
  • valid,
  • real,
  • free from doubt,
  • uncompromising,
  • incontestable,
  • confident,
  • convincing,
  • unshakable,
  • genuine,
  • unfaltering,
  • indubitable,
  • undeniable,
  • Persuaded,
  • bound,
  • unquestioning,
  • for a fact.
  •trustworthy (adjective)
  • boy scout,
  • up front,
  • all right,
  • fly right,
  • rock,
  • believable,
  • true blue,
  • saint,
  • level-headed,
  • down home.
  •trustworthy/trusty (adjective)
  • ethical,
  • authentic,
  • open,
  • saintly,
  • trustable,
  • plausible,
  • kosher,
  • on the level,
  • credible,
  • sensible,
  • levelheaded,
  • realistic,
  • principled,
  • square,
  • on up and up,
  • mature,
  • to be trusted,
  • up-front,
  • truthful.
  •unchanging (adjective)
  • equable,
  • unfading,
  • unfluctuating,
  • stabile.
  •unerring (adjective)
  • just,
  • errorless.
  •unfailing (adjective)
  • ceaseless,
  • constant,
  • dependable,
  • continuous,
  • tried-and-true,
  • rock solid,
  • consistent,
  • dyed-in-the-wool,
  • absolute,
  • unrelenting,
  • endless,
  • infallible,
  • assiduous,
  • counted on,
  • unlimited,
  • there,
  • boundless,
  • sure,
  • bottomless,
  • straight,
  • steadfast,
  • inexhaustible,
  • true,
  • diligent,
  • Delivering,
  • loyal,
  • continual,
  • staunch,
  • surefire,
  • unflagging,
  • invariable,
  • solid,
  • persistent,
  • reliable,
  • come-through,
  • continuing,
  • eternal,
  • trustworthy,
  • faithful,
  • never-failing,
  • same.
  •unfaltering (adjective)
  • mulish,
  • dead set on,
  • going all the way,
  • indefatigable,
  • bent on,
  • pigheaded,
  • unflinching,
  • stiff-necked,
  • stubborn,
  • untiring,
  • unflappable,
  • bound and determined,
  • meaning business,
  • wholehearted,
  • tireless.
  •unflagging (adjective)
  • active,
  • dynamic,
  • unretiring,
  • energetic,
  • unwearied.
  •unremitting (adjective)
  • round-the-clock.
  •untiring (adjective)
  • tenacious,
  • pertinacious,
  • Plugging,
  • perky,
  • eager beaver,
  • jumping,
  • unstinted,
  • indomitable,
  • go-go,
  • plodding,
  • dedicated,
  • undeterred,
  • hyper,
  • patient,
  • grind,
  • fireball.
  •unwearied (adjective)
  • eager,
  • strenuous,
  • unwearying,
  • Weariless,
  • enthusiastic,
  • ball of fire,
  • hard-working,
  • industrious,
  • on the go,
  • vigorous.

Antonyms for Un failing:

• adj.

  • consistent
    incompatible, unsuitable, untrustworthy, erratic, dishonest, incongruous, unfitting, inconsistent, inconstant, unreasonable, irregular, varying, disagreeing, unsteady, irrational.
  • constant
    disloyal, false, stopping, changeable, flagging, wavering, untrue, undecided, terminable, interrupted, ending, undetermined, unstable, fickle, fluctuating, Terminating, concluding.
  • continual
    broken, temporary, intermittent, Ceasing, occasional, halting, transient, discontinuous, bounded, sporadic, infrequent, finished, checked, completed.
  • dependable
    undependable, wobbly, irresponsible, weak, unreliable, unfaithful.
  • infallible
    erring, faulty, imperfect, fallible.
  • invariable
    mobile, unlike, moving, variable, different, movable, unfixed.
  • loyal
    faithless.
  • perennial
    ephemeral.
  • perpetual
    brief, fleeting, momentary, finite.
  • reliable
    indefinite, evil, vulnerable, unrespectable, fraudulent, unreal, soft, inadequate, bad, corrupt, deceptive.
  • round-the-clock
    incontinuous.
  • same
    polar.
  • sure
    doubting, hesitant, dubious, doubtful, unself-confident, swerving, doubted, unconfident, humbled.
  • trustworthy
    misleading, inconceivable, untruthful, unrealistic, incredible, unlikely, unconvincing, lying, immature, implausible, improbable.
  • trustworthy/trusty
    unbelievable.
  • unchanging
    flexible.
  • unerring
    mistaken, inaccurate.
  • unfailing
    failing, unsure, changing, uncertain, limited, impermanent.
  • unfaltering
    unsettled, faltering.
  • unflagging
    weary, tired.
  • untiring
    irresolute, unpersevering, tiring.