Rev_20:4 AndG2532 I sawG1492 thrones,G2362 andG2532 they satG2523 uponG1909 them,G846 andG2532 judgmentG2917 was givenG1325 unto them:G846 andG2532 I saw theG3588 soulsG5590 of them that were beheadedG3990 forG1223 theG3588 witnessG3141 of Jesus,G2424 andG2532 forG1223 theG3588 wordG3056 of God,G2316 andG2532 whichG3748 had notG3756 worshippedG4352 theG3588 beast,G2342 neitherG3777 hisG846 image,G1504 neitherG2532 G3756 had receivedG2983 his markG5480 uponG1909 theirG848 foreheads,G3359 orG2532 inG1909 theirG848 hands;G5495 andG2532 they livedG2198 andG2532 reignedG936 withG3326 ChristG5547 a thousandG5507 years.G2094
Rev_20:5 ButG1161 theG3588 restG3062 of theG3588 deadG3498 lived not againG326 G3756 untilG2193 theG3588 thousandG5507 yearsG2094 were finished.G5055 ThisG3778 is theG3588 firstG4413 resurrection.G386
Rev_20:6 BlessedG3107 andG2532 holyG40 is he that hathG2192 partG3313 inG1722 theG3588 firstG4413 resurrection:G386 onG1909 suchG5130 theG3588 secondG1208 deathG2288 hathG2192 noG3756 power,G1849 butG235 they shall beG2071 priestsG2409 of GodG2316 andG2532 of Christ,G5547 andG2532 shall reignG936 withG3326 himG846 a thousandG5507 years.G2094
Rev_20:7 AndG2532 whenG3752 theG3588 thousandG5507 yearsG2094 are expired,G5055 SatanG4567 shall be loosedG3089 out ofG1537 hisG846 prison,G5438
Mar 5:13 AndG2532 forthwithG2112 JesusG2424 gave them leave.G2010 G846 AndG2532 theG3588 uncleanG169 spiritsG4151 went out,G1831 andG2532 enteredG1525 intoG1519 theG3588 swine:G5519 andG2532 theG3588 herdG34 ran violentlyG3729 downG2596 a steep placeG2911 intoG1519 theG3588 sea,G2281 (they(G1161) wereG2258 aboutG5613 two thousand; )G1367 andG2532 were chokedG4155 inG1722 theG3588 sea.G2281
Here we have a Greek word G1367 dischilioi. "Dis" means two or twice and chilioi (G5507) means a thousand so this word means two thousand. Naturally then if there was one chilioi (G5507) it would be exactly a thousand just as it is in every occurrence of the word in the NT.
This is indisputable evidence that the thousand years is exactly a thousand years.
Rev_11:3 AndG2532 I will giveG1325 power unto myG3450 twoG1417 witnesses,G3144 andG2532 they shall prophesyG4395 a thousand two hundred and threescoreG5507 G1250 G1835 days,G2250 clothedG4016 in sackcloth.G4526
G5507 always means exactly one thousand like it does here. To mean more it needs to have more added to it. Here we have G5507 as exactly one thousand and then 260 added to that one thousand. Guess what? If we removed the 260 we have how many? Exactly one thousand, G5507.
So when we have G5507 alone, it is exactly one thousand. And when scripture speaks of "thousands" in the plural it uses chilias G5505 not G5507.
Rev_5:11 AndG2532 I beheld,G1492 andG2532 I heardG191 the voiceG5456 of manyG4183 angelsG32 round aboutG2943 theG3588 throneG2362 andG2532 theG3588 beastsG2226 andG2532 theG3588 elders:G4245 andG2532 theG3588 numberG706 of themG846 wasG2258 ten thousand times ten thousand,G3461 G3461 andG2532 thousands of thousands;G5505 G5505
If Revelation 20's thousand years was thousands of years like Amillennialism claims, the word needed would be chilias G5505 especially the double appearance of the word as found in Revelation 5:11, "thousands of thousands" which is truly an unknown amount. G5507 strictly means only one thousand and no more. It cannot mean 1001, nor an unknown number of thousands or millions etc.
I'll use an example to further explain the difference of the two words.
G5505 is like a thousand dollar bill. There is just one in your hand but it's worth a thousand dollars and the word is written in the singular because of this.
G5507 is like having one thousand dollar bills. That's worth the same exact amount, but it's a plural word because there is a thousand singles of something rather than one thing that equals a thousand. Imagine in your left hand a thousand dollar bill, and in your right hand a thousand one dollar bills. Same amount but the way each amount is represented is different.
5507 is plural in this sense, not that it means more than a thousand or multiples of thousands like 2000. That is not what the plural aspect means but that is how Amillennialism wrongly misdefines it.