unintermitting
11chronic — I adjective ceaseless, confirmed, constant, continual, continuing, continuous, cyclical, deep rooted, deep seated, drawn out, endless, enduring, entrenched, established, ever present, everlasting, extended, forever, frequent, habitual,… …
12durable — I adjective abiding, aeonian, ageless, amaranthine, ceaseless, changeless, chronic, constant, continual, continuing, endless, enduring, established, eternal, everlasting, firm, firmus, fixed, hard, hardy, holding up well, immortal, immovable,… …
13incessant — I adjective adsiduus, ceaseless, constant, continual, continuous, continuus, endless, eternal, everlasting, frequent, indefatigable, infinite, interminable, interminate, iterative, long lasting, never ending, nonstop, perennial, perpetual,… …
14relentless — I adjective assiduous, bowel less, brutish, cold, cold blooded, cold hearted, continuous, cruel, determined, dictatorial, endless, hard, hard of heart, hardhearted, harsh, heedless, immisericors, impenitent, imperious, implacable, inclement,… …
15ageless — Synonyms and related words: age old, ancient, antique, auld, ceaseless, coeternal, constant, continual, continuous, dateless, elderly, endless, eternal, eterne, ever being, ever durable, ever during, everlasting, everliving, hoary, immemorial,… …
16assiduous — 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,… …
17ceaseless — Synonyms and related words: ageless, amaranthine, articulated, catenated, chattering, coeternal, concatenated, connected, constant, continual, continued, continuing, continuous, cyclical, dateless, direct, endless, eternal, eterne, ever being,… …
18coeternal — Synonyms and related words: accompanying, ageless, agreeing, ceaseless, coetaneous, coeval, coexistent, coexisting, coinstantaneous, collateral, concomitant, concurrent, constant, contemporaneous, contemporary, conterminous, continual, continuous …
19connected — Synonyms and related words: affiliate, affiliated, affinitive, agnate, akin, allied, articulated, assembled, associate, associated, banded together, bound, bracketed, catenated, ceaseless, clean cut, clear, clear as crystal, clear as day, clear… …
20constant — Synonyms and related words: abiding, accordant, active, age long, aged, ageless, alike, ancient, antique, ardent, articulated, assiduous, atom, atomic mass, atomic number, atomic weight, automatic, balanced, beaten, catenated, ceaseless,… …
