Difference between Forever and Eternally

FOREVER vs ETERNALLY: NOUN

Perpetually; incessantly; at all times.
Without beginning or end of duration, or without end only; with reference to or throughout eternity.

Definitely, Long, Perpetuity, Indefinitely, Eternal, Never, Everlasting, Permanently, Forever and a day, Infinity, Evermore, Everlastingly, Always, Eternity, Eternally

Immutably, Unendingly, Forevermore, Perpetually, Ever, Indefinitely, Permanently, Still, Always, Constantly, Perennially, Endlessly, Evermore, Everlastingly, Forever

Endlessly, Lifetime, Definitely, Long, Perpetuity, Indefinitely, Eternal, Never, Everlasting, Permanently, Infinity, Evermore, Everlastingly, Always, Eternity

Hopelessly, Blissfully, Immutably, Unendingly, Forevermore, Ever, Indefinitely, Permanently, Still, Always, Constantly, Endlessly, Evermore, Everlastingly, Forever

That I am forever the head and not the tail, forever above only and not beneath.
And the servant abideth not in the house forever: but the Son abideth forever.
You will forever be in my heart, and I will forever be grateful for the little time we had.
The slave does not remain in the house forever; the son remains forever.
Dad where his spirit will live on forever; and I will forever hold these memories in my heart!
You will be forever loved and forever missed by so many.
Forever with the angles, forever in our minds and hearts.
You are forever loved and forever a part of me.
Israel forever, likewise, the Passover is a memorial forever.
He will be forever loved, remembered and forever missed.

We are eternally grateful to all of them.
We are loved profoundly and eternally by God!
Patrick Vickers to whom I am eternally grateful.
Because of His faithfulness, we are eternally secure.
Belated happy birthday to my eternally youthful friend!
But this seems to imply that if the cause of the universe existed eternally, the universe would also have existed eternally.
God is eternally one and also eternally the Father, the Son, and the Spirit, the three being distinct but not separate.
Oh, Alice, dead or living, eternally sleeping or eternally waking, listen to these few true words!
Eternally being pregnant is even worse in my opinion than rasing kids eternally.
If God eternally forgives us, then we are eternally cleansed of sin.