never-tiring
21pertinacious — I adjective adamant, adhering to a purpose, assidous, bent, bullheaded, certain, continuing, decided, determined, diligent, dogged, earnest, enduring, exhibiting purpose, faithful, firm, hard to get rid of, headstrong, holding to a purpose,… …
22assiduous — Synonyms and related words: advertent, agog, alert, all ears, all eyes, ardent, attentive, aware, careful, concentrated, conscious, constant, continuing, diligent, dogged, earnest, elaborate, enduring, energetic, faithful, fervent, finical,… …
23continuing — Synonyms and related words: abiding, age long, aged, ancient, antique, articulated, assiduous, catenated, ceaseless, changeless, chronic, concatenated, connected, constant, continual, continued, continuous, cyclical, diligent, direct, diuturnal,… …
24diligent — Synonyms and related words: academic, advertent, agog, alert, all ears, all eyes, ardent, assiduous, attentive, aware, bookish, careful, concentrated, conscientious, conscious, constant, continuing, devoted to studies, dogged, donnish, dryasdust …
25indefatigable — Synonyms and related words: abiding, ardent, assiduous, constant, continuing, continuous, determined, diligent, dogged, enduring, energetic, faithful, fervent, hard, hardworking, immutable, inalterable, indomitable, industrious, inexhaustible,… …
26industrious — Synonyms and related words: active, aggressive, ardent, assiduous, busy, conscientious, constant, continuing, diligent, dogged, dynamic, elaborate, enduring, energetic, faithful, fervent, hard, hard working, hardworking, hustling, immutable,… …
27relentless — Synonyms and related words: adamant, adamantine, ardent, assiduous, bound, bound and determined, bowelless, cast iron, ceaseless, certain, committed, constant, continual, continuing, continuous, cruel, decided, decisive, dedicated, definite,… …
28sedulous — Synonyms and related words: active, ardent, assiduous, busy, constant, continuing, diligent, dogged, elaborate, enduring, energetic, faithful, fervent, hard, hardworking, hustling, immutable, inalterable, indefatigable, indomitable, industrious,… …
29sleepless — Synonyms and related words: Argus eyed, agile, alert, alive, all ears, all eyes, ardent, assiduous, attentive, aux aguets, awake, bright, constant, continuing, custodial, diligent, disturbed, dogged, eagle eyed, enduring, energetic, faithful,… …
30stable — Synonyms and related words: Augean stables, abiding, accordant, accountable, adamantine, age group, age long, aged, alike, ancient, antique, articulated, assiduous, automatic, balanced, band, barn, battalion, bed, beleaguer, berth, beset, besiege …
