perpetual Synonym

timepiece, watch, chronometer, timer, timekeeper, alarm, hourglass, sundial, ticker, dial [x]

stages, periods, steps, phases [x]

planned, arranged, organized, slated, set, booked, programmed, appointed, fixed, prearranged, predetermined, timetabled, lined up, penciled in, on the agenda, on the calendar, on the docket, on the books, in the pipeline, in the works, in the offing, in the cards, in store, in the schedule, in the plan, in the program, in the itinerary, in the timetable, in the lineup, in the roster, in the queue, in the diary, in the log, in the register, in the ledger, in the chart, in the list, in the schedule of events, in the agenda, in the planner, in the calendar of events, in the itinerary of events, in the timetable of events, in the lineup of events, in the roster of events, in the queue of events, in the diary of events, in the log of events, in the register of events [x]

double, two times, on two occasions, in two instances, doubly [x]

pause, rest, intermission, recess, interval, hiatus, respite, breather, time-out, lull, cessation, halt, stoppage, interruption, discontinuation, layoff, suspension, gap, split, fracture, rupture, crack, shatter, burst, snap, disintegration, fragmentation, severance, disconnection, separation, detachment, disengagement, fissure, cleft, rift, schism, breach, disruption, disunion, disjunction, disbandment, dissolution, disassembly, collapse, splintering, crumbling [x]

slip, error, mistake, blunder, oversight, fault, failure, misstep, omission, drop, decline, deterioration, regression, backslide, relapse, break, interruption, pause, interval, gap, hiatus, cessation, suspension, discontinuation, break-off, halt, stop, standstill, freeze, stasis, intermission, recess, respite, breather, letup, lull, abeyance, quiescence, dormancy, inactivity, inaction, stagnation, torpor, hibernation [x]

uninterrupted, constant, unceasing, perpetual, incessant, nonstop, unbroken, sustained, ongoing, endless, ceaseless, unremitting, unending, eternal, steady, relentless, persistent, unvarying, unchanging, unflagging, unrelenting, seamless, unhalting, unyielding, interminable, unrelieved, unmitigated, unqualified, unbounded, unrestrained, unmoderated, uncurbed, unbridled, unhampered, unimpeded [x]

punctual, prompt, timely, exact, precise, on time, sharp, accurate, on schedule [x]

sandglass, sand timer, sand clock, egg timer, sand watch [x]

monthly [x]

immutable, fixed, invariable, constant, unalterable, permanent, stable steadfast, unmodifiable, enduring, unvarying, unyielding, inflexible, unmovable, unshakable, unadaptable, unchangeful [x]

constantly, continuously, perpetually, incessantly, unceasingly, endlessly, unremittingly, without stopping, without end, nonstop, eternally, forever, interminably, relentlessly, unendingly, always, everlastingly, persistently, unbrokenly, unrelentingly, without pause, without interruption, ceaseless [x]

constantly, continuously, incessantly, unceasingly, endlessly, eternally, always, forever, perpetually, ceaselessly, unremittingly, interminably, everlastingly, unendingly, without end, without interruption, without cease, without stopping, non-stop, around the clock, day and night, at times, permanently, indefinitely, timelessly, unchangingly, unvaryingly, unalterably, unbrokenly, unrelentingly, relentlessly, persistently, steadily, regularly, habitually, unfailingly, invariably, recurrently, repeatedly, frequently, often, commonly, customarily, routinely, usually, typically, traditionally, perennially, seasonally, cyclically [x]

eternal, perpetual, enduring, infinite, timeless, undying, immortal, unending, ceaseless, unceasing, interminable, boundless, ageless, deathless, imperishable, unchanging, constant, abiding, lasting, permanent, unfading, unremitting, unrelenting, continuous, incessant, unbroken, unvarying, persistent, never-ending, endless, unwearied, unyielding, unflagging, unflinching, steadfast, unalterable, immutable, unshakable, unmovable, perennial, sempiternal, perdurable, amaranthine, dateless, aeonian, unbounded, limitless, measureless, unmeasured [x]

hebdomadal, seven-day, once-a-week, every seven days [x]