never-tiring
51invincible — Synonyms and related words: assiduous, beyond compare, beyond comparison, calculable, constant, continuing, deathless, dependable, diligent, dogged, easily first, enduring, facile princeps, faithful, faithworthy, fast, firm, immortal, immutable,… …
52lasting — Synonyms and related words: abiding, adamantine, age long, aged, alive, ancient, antique, assiduous, bulky, cartilaginous, changeless, chewy, chronic, chronological, cohesive, constant, continual, continuing, continuous, coriaceous, dense,… …
53loyal — Synonyms and related words: abandoned, acquiescent, active, afire, ardent, assiduous, burning, committed, compliant, complying, conforming, conscientious, consistent, constant, continuing, dedicated, dependable, devoted, devout, diligent, dogged …
54obstinate — Synonyms and related words: adamant, adherent, adhesive, adversary, adversative, adverse, alien, antagonistic, anti, antipathetic, antithetic, assiduous, balking, balky, beefy, bigoted, bloody minded, bouncing, bound, bound and determined,… …
55patient — Synonyms and related words: Spartan, accepting, accommodating, acquiescent, apoplectic, armed with patience, arthritic, assiduous, benevolent, bovine, case, charitable, clement, compassionate, compliant, conciliatory, constant, consumptive,… …
56persevering — Synonyms and related words: Spartan, accepting, armed with patience, assiduous, balking, balky, bigoted, bound, bound and determined, bulldogged, bulletheaded, bullheaded, case hardened, committed, constant, continuing, decided, decisive,… …
57persistent — Synonyms and related words: abiding, accordant, adherent, adhesive, age long, aged, alike, ancient, antique, archaic, assiduous, automatic, balanced, beaten, booming, bound, bound and determined, bulldogged, bulldoggish, bulldoggy, bullheaded,… …
58pertinacious — Synonyms and related words: assiduous, balking, balky, bigoted, bulldogged, bulldoggish, bulletheaded, bullheaded, case hardened, clamant, clamorous, constant, continuing, crying, demanding, diligent, dogged, dogmatic, draining, enduring,… …
59plodding — Synonyms and related words: application, arid, assiduity, assiduous, assiduousness, banausic, barren, blah, blank, bloodless, bulldog tenacity, characterless, cold, colorless, concentration, constancy, constant, continuing, dead, diligence,… …
60plugging — Synonyms and related words: application, assiduity, assiduous, assiduousness, bulldog tenacity, concentration, constancy, constant, continuing, diligence, diligent, dogged, dogged perseverance, doggedness, donkeywork, drudge, drudgery, drudging,… …
