perpetual

As adjectives the difference between perpetual and neverending

is that perpetual is lasting forever, or for an indefinitely long time while neverending is having no end or being endless.

Perpetual is a related term of sustained.

As adjectives the difference between perpetual and sustained

is that perpetual is lasting forever, or for an indefinitely long time while sustained is held continuously at a certain level.

As a verb sustained is

(sustain).

As adjectives the difference between gradual and perpetual

is that gradual is proceeding by steps or small degrees; advancing step by step, as in ascent or descent or from one state to another; regularly progressive; slow while perpetual is lasting forever, or for an indefinitely long time.

As a noun gradual

is (roman catholic church) an antiphon or responsory after the epistle, in the mass, which was sung on the steps, or while the deacon ascended the steps.

As adjectives the difference between unrelenting and perpetual

is that unrelenting is not relenting; having no pity; not being or becoming lenient, mild, gentle, or merciful; unyielding; inflexibly rigid; hard; stern; cruel while perpetual is lasting forever, or for an indefinitely long time.

As an adjective perpetual is

lasting forever, or for an indefinitely long time.

Perpetual is a related term of protracted.

As adjectives the difference between perpetual and protracted

is that perpetual is lasting forever, or for an indefinitely long time while protracted is lasting for a long time or longer than expected or usual.

As a verb protracted is

(protract).

Perpetual is a related term of unbroken.

As adjectives the difference between perpetual and unbroken

is that perpetual is lasting forever, or for an indefinitely long time while unbroken is whole, not divided into parts.

Unceasing is a related term of perpetual.

As adjectives the difference between unceasing and perpetual

is that unceasing is continuous; continuing indefinitely without stopping while perpetual is lasting forever, or for an indefinitely long time.

As an adjective perpetual

is lasting forever, or for an indefinitely long time.

As a noun proposition is

(uncountable) the act of offering (an idea) for consideration.

As a verb proposition is

to propose a plan to (someone).