You need to look up what the Greek word for punishment is ----and you will see here ----it also means torment -----
Strong’s Definitions
κόλασις kólasis, kol'-as-is; from
G2849;
penal infliction:—punishment, torment.
Strong's Concordance
kolasis: correction
Usage: chastisement, punishment,
torment
Cognate: 2851 kólasis (from kolaphos, "a buffeting, a blow") – properly, punishment that "fits" (matches) the one punished; torment
Mat 25:45-46
Then shall he answer them, saying, Verily I say unto you, Inasmuch as ye did
it not to one of the least of these, ye did
it not to me.And these shall go away into
everlasting punishment: but the righteous into life eternal.
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I say -----So you can use everlasting torment here in verse 46 as it means the same as punishment -----
KJV Dictionary Definition: punish
punish
PUN'ISH, v.t.
L. punio, from the root of poena,pain. The primary sense is to press or strain.
To pain; to afflict with pain, loss or calamity for a crime or fault; primarily,
to afflict with bodily pain
Afflicting with pain, penalty or
suffering of any kind, as the retribution of a crime or offense.
KJV Dictionary Definition: torment
torment
pain; anguish; misery, either of body or mind ,suffering
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Both words can be used -----in reference to Hell -----as the person will experience much pain ---anguish --misery --suffering ----and more as they are separated from God for all eternity ------not a nice place to go Folks ----