perpetual

As adjectives the difference between mortal and perpetual

is that mortal is susceptible to death by aging, sickness, injury, or wound; not immortal while perpetual is lasting forever, or for an indefinitely long time.

As a noun mortal

is a human; someone susceptible to death.

As adjectives the difference between perpetual and perpendicular

is that perpetual is lasting forever, or for an indefinitely long time while perpendicular is (architecture) of a style of english gothic architecture from the fourteenth and fifteenth centuries.

As adjectives the difference between sustainable and perpetual

is that sustainable is able to be sustained 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 proper noun plenty is

a village in saskatchewan, canada.

As adjectives the difference between perpetual and inexorable

is that perpetual is lasting forever, or for an indefinitely long time while inexorable is unable to be persuaded; relentless; unrelenting.

As adjectives the difference between perpetual and occult

is that perpetual is lasting forever, or for an indefinitely long time while occult is (lb) secret; hidden from general knowledge; undetected.

As a verb occult is

(astronomy) to cover or hide from view.

As a noun occult is

supernatural affairs.

As adjectives the difference between perfidious and perpetual

is that perfidious is of, pertaining to, or representing perfidy; disloyal to what should command one's fidelity or allegiance 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 letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As adjectives the difference between deathless and perpetual

is that deathless is undying or immortal while perpetual is lasting forever, or for an indefinitely long time.

As adjectives the difference between perpetual and relentless

is that perpetual is lasting forever, or for an indefinitely long time while relentless is unrelenting or unyielding in severity.