abiding accordant alike automatic balanced blah broken-record ceaseless changeless chattering consistent consonant constant continual continuing continuous correspondent drearisome dreary dry dryasdust dull durable dusty enduring equable equal even everlasting firm fixed flat frozen harping homogeneous humdrum immobile immutable incessant incommutable inconvertible indefeasible inert insusceptible of change intact intransmutable invariable inviolate irretrievable irreversible irrevocable jog-trot lasting level long-winded machine gun measured mechanical methodic monolithic monotonous noble nonreturnable nonreversible of a piece ordered orderly oscillating perennial permanent perpetual persistent prolix pulsating quiescent rapid regular remaining repeated reverseless rigid robotlike singsong smooth solid stabile stable staccato static stationary staying steadfast steady stuttering sustained systematic tedious torpid treadmill unalterable unalterative unaltered unbroken unceasing unchangeable unchanged unchanging unchecked undeflectable undestroyed undeviating undifferentiated undiversified uneventful unfading unfailing uniform unintermitted unintermittent unintermitting uninterrupted unmodifiable unremitting unrestorable unreturnable unruffled unshifting unstopped unsusceptible unvariable unvaried vibrating