are dead [muwth], they shall not live [chayah]; they are deceased [rapha'], they shall
not rise [quwm]: therefore hast thou visited [paqad] and destroyed [shamad]
them, and made all their memory [zeker] to
perish ['abad]. KJV-Interlinear
14 They are dead, they will not live; they are shades, they will not
arise; to that end you have visited them with destruction and wiped out all
remembrance of them. ESV
When history runs its course, then evil will cease to exist. Dead means just that.
The dead do not live. The dead cannot cause trouble.
Deceased, simply re-emphasizes that the dead are not living, but also they are gone from his world. They are gone to the land of the dead.
Between the land of the living, and the land of the dead is a great gulf across which the dead cannot return. Not on their own anyway.
So dead means not living as is the manner of living creatures. Deceased means gone from his world.
Evil, once obliterated, cannot raise its ugly head ever again, cannot rule, cannot cause or be the cause of trouble.
And it is God who visited the evil ones, and it is God who judges, and it is God who issues the final execution order, and it is God who sends and removes evil out of life.
And it will be God who will remove evil from all memory, and the memory of evil will be no more.
Who wants to leave this world and this universe and carry with them the ugly things of the old, into the new?
God will not bring anything of the old into the new, and certainly not evil.
Eternity will begin with perfection, just as this original universe when it was created, was perfect, and the Garden when it was restored, was perfect, but the new universe will not cease in its perfection. Evil will no longer exist, to taint it.