Premillennialism, which is definitely what I believe in, is also called chiliasm.
https://www.etymonline.com/search?q=chiliasm
chiliasm (n.)
"the doctrine of the millennium (suggested by Revelation xx), the theological opinion that Christ and the saints will reign visibly and corporeally on earth for 1,000 years before the final struggle between good and evil," c. 1600, from Latinized form of Greek khiliasmos, from khilias,
from khilioi "a thousand, the number 1,000," which is probably from a PIE *gheslo-, source also of Sanskrit sahasra- "thousand" and perhaps also Latin mille, but the exact original sense of the root is unclear. Related: Chiliast; chiliastic.
As we just read, chiliasm is so named because the Greek word "khilioi" means "a thousand," and that is the word that we find translated into English as "a thousand" in verses of scripture such as these:
2Pe 3:8
But, beloved, be not ignorant of this one thing, that one day
is with the Lord as a thousand
G5507 years, and a thousand
G5507 years as one day.
Rev 20:2
And he laid hold on the dragon, that old serpent, which is the Devil, and Satan, and bound him a thousand
G5507 years,
Rev 20:3
And cast him into the bottomless pit, and shut him up, and set a seal upon him, that he should deceive the nations no more, till the thousand
G5507 years should be fulfilled: and after that he must be loosed a little season.
Rev 20:4
And I saw thrones, and they sat upon them, and judgment was given unto them: and
I saw the souls of them that were beheaded for the witness of Jesus, and for the word of God, and which had not worshipped the beast, neither his image, neither had received
his mark upon their foreheads, or in their hands; and they lived and reigned with Christ a thousand
G5507 years.
Rev 20:5
But the rest of the dead lived not again until the thousand
G5507 years were finished. This
is the first resurrection.
Rev 20:6
Blessed and holy
is he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and shall reign with him a thousand
G5507 years.
Rev 20:7
And when the thousand
G5507 years are expired, Satan shall be loosed out of his prison,