Difference between Unending and Eternal

UNENDING vs ETERNAL: NOUN

Tiresomely long; seemingly without end
Lasting for an indefinitely long period of time
Continuing forever or indefinitely
Being without beginning or end.
Continuing without interruption; perpetual: : continual.
Seemingly endless; interminable.
Lasting forever; unending.
An appellation of Rome.
Exceedingly great or bad; -- used as a strong intensive.
Existing at all times without change; immutable.
Without beginning or end of existence; always existing.
Without end of existence or duration; everlasting; endless; immortal.
Continued without intermission; perpetual; ceaseless; constant.
Existing outside time; as opposed to sempiternal, existing within time but everlastingly

Existing without beginning or end of existence; existing throughout all time.
Having a beginning but no end of existence or duration; everlasting; endless; imperishable: as, eternal fame.
In a special metaphysical use, existing outside of all relations of time; independent of all time-conditions; not temporal.
By hyperbole, having no recognized or perceived end of existence; indefinite in duration; perpetual; ceaseless; continued without intermission.
“married to immortal verse,”
It is sometimes applied to God (1 Tim. i. 17). Perpetual points to the future, and applies especially to that which is established: as, a perpetual covenant, desolation, feud. It is freely applied to anything that lasts indefinitely. All the four words are often used by hyperbole for that which has long duration. See incessant.
Tiresomely long
Seemingly without end

Continuous, Relentless, Infinite, Interminable, Unrelenting, Incessant, Ceaseless, Endless, Permanent, Ageless, Lasting, Eternal, Everlasting, Perpetual, Unceasing

Forever, Undying, Eonian, Aeonian, Long, Permanent, Lasting, Interminable, Unceasing, Endless, Ageless, Unending, Immortal, Perpetual, Everlasting

Continuous, Relentless, Infinite, Interminable, Unrelenting, Incessant, Ceaseless, Endless, Permanent, Ageless, Lasting, Eternal, Everlasting, Perpetual, Unceasing

Forever, Undying, Eonian, Aeonian, Long, Permanent, Lasting, Interminable, Unceasing, Endless, Ageless, Unending, Immortal, Perpetual, Everlasting

That will be an unending injury to this country.
Her list of triumphs was well nigh unending.
You will see an unending call for revenge.
Sending you prayers for unending love and happiness.
The benefits of mindfulness or awareness are unending.
Monterey area, an unending canvas of serene beauty.
Bill was able to answer my unending questions.
May you receive unending happiness in your life.
There were unending quarrels between Sauckel and myself.
Artists and writer lift veil on dementia's 'Unending Shadow' - ABC News (Australian Broadcasting Corporation)Artists and writer lift veil on dementia's 'Unending Shadow'.

If we indeed are eternal creatures then some sort of eternal place where those who have not chosen God, must exist.
And these shall go away into eternal punishment, but the righteous into life eternal.
One of the most compelling arguments for eternal security is based on when eternal life begins.
God, by His eternal resolve of will, has predestined certain men to eternal blessedness.
Higher Power saves humanity from spiritual death or eternal damnation by providing eternal life.
There is nothing eternal about the earth except eternal change, some one has said.
There are some other similar phrases like eternal judgment and eternal destruction.
As God is eternal, then Love also must be eternal.
Only the sleep eternal In an eternal night.
This eternal punishment is contrasted with eternal life.