Pronunciation of Relentless
/ɹɪlˈɛntləs/, /ɹɪlˈɛntləs/, /ɹ_ɪ_l_ˈɛ_n_t_l_ə_s/

Antonyms for relentless:

sporadic, placable.

Synonyms for relentless:

Sense 1

unceasing, unbendable, brassbound, round the clock, eternal, Incompliant, unremitting, around the clock, uncompliant, timeless.

Sense 2

continuous, incessant, nonstop, ceaseless, unending, ongoing, interminable, die-hard, uninterrupted.

Sense 3

remorseless, unfailing, everlasting.

Sense 4

iron, perpetual, endless.





Other synonyms and related words:

incessant, savage, unending, ceaseless, Incompliant, die-hard, iron, blue, uncompliant, interminable, unmitigated, disconsolate, eternal, intransigent, adamantine, adamant, everlasting, merciless, dismal, unceasing, lasting, ghastly, perpetual, dark, endless, black, uninterrupted, fierce, ongoing, unremitting, unrelenting, macabre, brutal, mordant, grisly, unappeasable, unforgiving, continuous, sick, forbidding, gloomy, unbendable, continual, gruesome, unfailing, round the clock, pertinacious, hard core, remorseless, stiff, haunting, cruel, sorry, brassbound, timeless, unsparing, nonstop, pitiless.

absolute (adjective)

hard core.

continuous, neverending (adjective)

persistent, nonstop, unremitting, tenacious, incessant, pertinacious.

cruel, merciless (adjective)

pitiless, inflexible, unrelenting, rigorous, unappeasable, dogged, implacable, fierce, uncompromising, unyielding, remorseless, rigid, inexorable, stringent, grim, strict, unbending, determined, obdurate, unforgiving, ruthless, adamant, unflinching, stiff, harsh.

hell-bent (adjective)


obstinate (adjective)


pitiless (adjective)

merciless, cruel.

resolute (adjective)

intent, dogged, staunch, faithful, loyal, steadfast, tireless, bold, serious, implacable, unflinching, deliberate, stubborn, steely, unchangeable, insistent, ruthless, set, dauntless, firm, tough, spunky, persistent, indomitable, committed, dedicated, true, bullheaded, plucky, resolved, resolute, valiant, indefatigable, fearless, stern, decisive, steady, uncompromising, hearty, reliable, unwavering, unyielding, iron-willed, unshakeable, willing, thorough, devoted, strong-minded, inexorable, tenacious, unbending, strong-willed, constant, diligent, determined, zealous, earnest, persevering, courageous, decided, headstrong.

severe (adjective)

frosty, basic, inflexible, dry, rigorous, austere, severe, ascetic, stark, blunt, sharp, piquant, correct, raw, disciplined, obstinate, dour, demanding, icy, bleak, intense, meticulous, harsh, obdurate, abrupt, prudish, cool, draconian, keen, imperial, unsparing, astringent, unbending, precise, brusque, acerbic, hidebound, uncompromising, critical, cutting, spartan, short, oppressive, stiff-necked, acrimonious, intolerant, rigid, strict, spare, strait-laced, tart, acute, brisk, gruff, curt, lean, stern, exacting, stringent, authoritarian, crisp, puritanical, fundamental, censorious, grim, caustic, chilly.

unsparing (adjective)


untiring (adjective)


Sense 2 (noun)

remorseless, iron, unbendable, brassbound, uncompliant, Incompliant, die-hard.

Sense 3 (noun)

interminable, ceaseless, unending, unremitting, eternal, ongoing, continuous, timeless, incessant, unceasing, unfailing, endless, around the clock, everlasting, nonstop, round the clock, uninterrupted, perpetual.

implacable (noun)

remorseless, unremitting, cruel.

relentless (noun)

grim, inexorable, stern, continual, unforgiving, unappeasable, persistent, implacable, unrelenting.

Usage examples for relentless:

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approved, well-known, observed, famous, official, sanctioned, storied, noised about, legitimate, conventional.