These words are used interchangeable throughout the Scripture, but would suggest that there is a difference. There are many scriptures containing the words but here is the thought:
Eternal is always was / is / will Be … lasting or existing forever; without end or beginning.
God is EternalGenesis 1:1 In the beginning God …. Deuteronomy 33:27 The eternal God is thy refuge, … (Genesis 21:33 refers to the LORD and the everlasting God.) Psalm 41:13 Blessed be the Lord God of Israel from everlasting, and to everlasting. (i.e. eternal) Amen, and Amen.
And many other scripture can be noted using the word everlasting.
Lord Jesus is Eternal John 1:1-3,14 In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God. All things were made by him; and without him was not anything made that was made. And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.
Romans 1:20 For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:
Ephesians 3:11 According to the eternal purpose which he purposed in Christ Jesus our Lord:
1 Timothy 1:17 Now unto the King eternal, immortal, invisible, the only wise God, be honour and glory for ever and ever. Amen.
Hebrews 13:8 Jesus Christ the same yesterday, and today, and forever.
Holy Spirit is Eternal Hebrews 9:14 How much more shall the blood of Christ, who through the eternal Spirit offered himself without spot to God, purge your conscience from dead works to serve the living God?
Heaven (God’s Abode) is Eternal 2 Corinthians 5:1 For we know that if our earthly house of this tabernacle were dissolved, we have a building of God, an house not made with hands, eternal in the heavens.
Kingdom of God is Eternal and Spiritual John 3:3 Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God
Romans 14:17 For the kingdom of God is not meat and drink; but righteousness, and peace, and joy in the Holy Ghost. 1 Corinthians 4:20 For the kingdom of God is not in word, but in power. 1 Corinthians 15:50 Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; neither doth corruption inherit incorruption.
Angels are Everlasting Matthew 25:41 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:
Colossians 1:16 For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by him, and for him:
2 Peter 2:4 For if God spared not the angels that sinned, but cast them down to hell, and delivered them into chains of darkness, to be reserved unto judgment;
Jude 1:6 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.
Satan (Lucifer-Devil) is Everlasting Ezekiel 28:13-15 Thou hast been in Eden the garden of God; every precious stone was thy covering, the sardius, topaz, and the diamond, the beryl, the onyx, and the jasper, the sapphire, the emerald, and the carbuncle, and gold: the workmanship of thy tabrets and of thy pipes was prepared in thee in the day that thou wast created. Thou art the anointed cherub that covereth; and I have set thee so: thou wast upon the holy mountain of God; thou hast walked up and down in the midst of the stones of fire. Thou wast perfect in thy ways from the day that thou wast created, till iniquity was found in thee.
Isaiah14:12-15 How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations! For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north: I will ascend above the heights of the clouds; I will be like the most High. Yet thou shalt be brought down to hell, to the sides of the pit.
Revelation 20:10 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.
Man is Everlasting Genesis 1:27 So God created man in his own image, in the image of God created he him; male and female created he them.
Believers are Everlasting Ephesians 2:10 For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them.
Ephesians 4:24 And that ye put on the new man, which after God is created in righteousness and true holiness.
John 3:15,16,18,38 That whosoever believeth in him should not perish, but have eternal life. 16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. 18 He that believeth on him is not condemned: …36 He that believeth on the Son hath everlasting life: …
Unbelievers are Everlasting
John 3:18,38 …: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. 36 …: and he that believeth not the Son shall not see life; but the wrath of God abideth on him. Revelation 20:11-15 And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them. And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works. And the sea gave up the dead which were in it; and death and hell delivered up the dead which were in them: and they were judged every man according to their works. And whosoever was not found written in the book of life was cast into the lake of fire.
Kingdom of Heaven is Everlasting Matthew 3:2 And saying, Repent ye: for the kingdom of heaven is at hand. (it’s only taught by the Lord Jesus in the book of Matthew).
Earth is Everlasting Genesis 1:1 In the beginning God created the heaven and the earth.
Revelation 21:1 And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea.
Hell is Everlasting Matthew 25:41 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:
Revelation 20:14 And death and hell were cast into the lake of fire. This is the second death.
Lake of Fire is Everlasting Revelation 20:14 And death and hell were cast into the lake of fire. This is the second death.
Yes, ETERNAL LIFE is promised all thru scripture to all those that BELIEVE. And it will be for all eternality in a place we can’t even begin to see, hope for, or even know.
1 Corinthians 2:9 But as it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him. And this is not a promise just to church age saints but to all believers:
Isaiah 64:4 For since the beginning of the world men have not heard, nor perceived by the ear, neither hath the eye seen, O God, beside thee, what he hath prepared for him that waiteth for him.
God’s covenant(s) with mankind, and Israel are EVERLASTING. The land given to Abraham (and his descendants were for an everlasting possession. The priesthood (Exodus 40:14) is referred to as everlasting.
So, Everlasting has a beginning but no end, therefore once it starts, it is eternal!