If go thru the bible and fix a few key words such as eternal, forever, hell, eternity, etc.
You want to change these words? That might not be a very good idea. Lets take a look,
Jesus said, "And these shall go away into everlasting punishment, but the righteous into life eternal." (Matthew 25:46)
The Bible says that salvation is eternal (Hebrews 5:9),
life is eternal (John 6:54),
redemption is eternal (Hebrews 9:12),
and the inheritance of the saints is eternal (Hebrews 9:15).
But it says also that the fire of Hell is eternal and everlasting (Matthew 18:8; Jude 7).
Each use of the words "eternal" and "everlasting" in the verses above are derived from the same Greek word, aiōnios. So, if you are going to change the words "eternal" and "everlasting" in order to make everlasting punishment and eternal and everlasting fire of Hell, into something less than eternal and everlasting, then you are also making eternal salvation, life, redemption and the inheritance of the saints into something less than eternal and everlasting.
to whom is reserved the blackness of darkness for ever.(Jude 1:13),
the torment is for ever and ever (Revelation 20:10),
And the smoke of their torment ascendeth up for ever and ever:(Revelation 14:11),
Jesus Christ the same yesterday, and to day, and for ever.(Hebrews 13:8),
but he that doeth the will of God abideth for ever(1 John 2:17),
God, who liveth for ever and ever(Revelation 15:7),
Thy throne, O God, is for ever and ever:(Hebrews 1:8),
Comforter, that he may abide with you for ever;(John 14:16).
In these verses, the use of the words "for ever" and "for ever and ever" are all derived from the same Greek words, "eis" & "aiōn." If you are going to change the words "for ever" and "for ever and ever," in order to make the blackness of darkness, the torment and the smoke of their torment something less than "for ever" and "for ever and ever," then you are also making the sameness of Christ, the lifespan of the doer of the will of God, the lifespan of God, the throne of God and the amount of time the Comforter(Holy Spirit) lives within the believer something less than "for ever" and "for ever and ever."
It is unreasonable to assume that there is an eternal Heaven but not an eternal Hell. Eternal punishment is as much a truth of God’s Word as is the eternal rewards for the righteous. The same words are used to describe them, so you either have both, or you have neither.
The following is an excerpt from an article I read concerning hell. It says it alot better than I can...
Hell--A Literal Place of Future Punishment
Some people engage themselves in much wishful thinking about Hell. It has been said that the fires of Hell mean the torments of conscience. Others say that Hell is simply the grave. We do not question that the torments of conscience will be included in the eternal punishment of the lost, though Hell will not be the torments of conscience only. But we cannot agree at all with those who teach that Hell is simply the grave. One must be either a deceiver or an illiterate to say that Hell is the grave. When the unsaved rich man died he went to Hell, and cried: “I am tormented in this flame” (Luke 16:24). Certainly he was not merely in the grave. He had five brothers whom he desired to be saved lest they also should come to that place of torment. Now if his five brothers would have repented and become saved, their conversion could not have kept them from the grave, for “it is appointed unto men once to die” (Hebrews 9:27). Repentance and conversion will keep one from Hell but never from the grave. The bodies of all men, excepting those believers who are alive when Christ comes, will return to the dust. Hell is not the grave. The body of the rich man was dead, but that man knew that his soul was in a literal place and not merely in a spiritual state.
Notice the use of the word “fire,” which denotes that the fire of Hell is as literal as the place itself. Repeatedly our Lord and the apostles spoke of the fire of Hell.
But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council; but whosoever shall say, Thou fool, shall be in danger of hell fire (Matthew 5:22).
Every tree that bringeth not forth good fruit is hewn down, and cast into the fire (Matthew 7:19).
The Son of man shall send forth his angels, and they shall gather out of his kingdom all things that offend, and them which do iniquity; And shall cast them into a furnace of fire: there shall be wailing and gnashing of teeth (Matthew 13:41, 42).
Wherefore if thy hand or thy foot offend thee, cut them off, and cast them from thee: it is better for thee to enter into life halt or maimed, rather than having two hands or two feet to be cast into everlasting fire. And if thine eye offend thee, pluck it out, and cast it from thee: it is better for thee to enter into life with one eye, rather than having two eyes to be cast into hell fire (Matthew 18:8, 9).
Then shall he say also unto them on the left hand, Depart from me, ye cursed, into everlasting fire, prepared for the devil and his angels (Matthew 25:41).
Where their worm dieth not, and the fire is not quenched (Mark 9:44).
And he cried and said, Father Abraham, have mercy on me, and send Lazarus, that he may dip the tip of his finger in water, and cool my tongue; for I am tormented in this flame (Luke 16:24).
In flaming fire taking vengeance on them that know not God, and that obey not the gospel of Our Lord Jesus Christ (2 Thessalonians 1:8).
And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day. Even as Sodom and Gomorrah, and the cities about them in like manner, giving themselves over to fornication, and going after strange flesh, are set forth for an example, suffering the vengeance of eternal fire (Jude 6, 7).
The same shall drink of the wine of the wrath of God, which is poured out without mixture into the cup of his indignation; and he shall be tormented with fire and brimstone in the presence of the holy angels, and in the presence of the Lamb (Revelation 14:10).
Therefore shall her plagues come in one day, death, and mourning, and famine; and she shall be utterly burned with fire: for strong is the Lord God who judgeth her (Revelation 18:8).
And the beast was taken, and with him the false prophet that wrought miracles before him, with which he deceived them that had received the mark of the beast, and them that worshipped his image. These both were cast alive into a lake of fire burning with brimstone (Revelation 19:20).
And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever (Revelation 20:10).
And death and hell were cast into the lake of fire. This is the second death. And whosoever was not found written in the book of life was cast into the lake of fire (Revelation 20:14, 15).
But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death (Revelation 21:8).
You may study these statements and believe them, or else you may pass them by. You may believe that the Bible is for today, or else you may laugh at it as a bit of obsolete dogma. But today you are face to face with eternal statements in the Word of God which will survive the heavens and the earth. Your unbelief cannot disprove nor alter them. When the resurrected physical bodies of the unbelievers of every age leave the Judgment of the Great White Throne, they will go into a literal Hell of fire.
And be sure that the body will share with the soul in its suffering. Jesus said: “Marvel not at this: for the hour is coming, in which all that are in the graves shall hear his voice, And shall come forth; they that have done good, unto the resurrection of life; and they that have done evil, unto the resurrection of damnation” (John 5:28, 29). May we ask what part of man is in the grave? We all agree that it is his body. Therefore we can depend on Christ’s statement that that part of man that is buried in the grave will come forth to be damned eternally.