endless

continuous

kənˈtɪnjʊəs

adjective

forming an unbroken whole; without interruption.

the whole performance is enacted in one continuous movement

continual,uninterrupted,unbroken,constant,ceaseless,incessant,steady,sustained,solid,continuing,ongoing,unceasing,without a break,permanent,non-stop,round-the-clock,always-on,persistent,unremitting,relentless,unrelenting,unabating,unrelieved,without respite,endless,unending,never-ending,perpetual,without end,everlasting,eternal,interminable,consecutive,running,with no let-up,without surcease

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constant

ˈkɒnst(ə)nt

adjective

occurring continuously over a period of time.

the constant background noise of the city

continual,continuous,persistent,sustained,abiding,round-the-clock,ceaseless,unceasing,perpetual,incessant,never-ending,everlasting,eternal,endless,unending,unabating,non-stop,perennial,unbroken,uninterrupted,unrelieved,interminable,unremitting,relentless,unrelenting,without respite,sempiternal,steadfast,steady,resolute,determined,persevering,tenacious,dogged,unwavering,unflagging,unshaken

noun

a situation that does not change.

the condition of struggle remained a constant

unchanging factor,unchanging state of affairs,unchanging situation,given

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changeless

ˈtʃeɪn(d)ʒləs

adjective

remaining the same.

changeless truths

unchanging,unvarying,timeless,static,standing,fixed,permanent,constant,unchanged,fast,consistent,uniform,undeviating,stable,steady,unchangeable,unalterable,invariable,immutable,lasting,long-lasting,abiding,enduring,persistent,indefinite,continuing,perpetual,everlasting,perennial,unending,endless,never-ending

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ceaseless

ˈsiːsləs

adjective

constant and unending.

the fort was subjected to ceaseless bombardment

continual,constant,continuous,incessant,unceasing,unending,endless,never-ending,interminable,non-stop,uninterrupted,unabated,unabating,unremitting,relentless,unrelenting,unrelieved,sustained,persistent,lasting,eternal,perpetual,unfaltering,unflagging,untiring,unwearied,unwavering,unswerving,undeviating,persevering,dogged,tireless,indefatigable

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boundless

ˈbaʊndləs

adjective

unlimited or immense.

enthusiasts who devote boundless energy to their hobby

limitless,without limit,unlimited,illimitable,unbounded,untold,bottomless,immeasurable,measureless,incalculable,inestimable,abundant,abounding,great,inexhaustible,no end of,endless,unending,never-ending,without end,infinite,undying,interminable,unfailing,unfading,unceasing,ceaseless,everlasting

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