The Bible clearly teaches that the Antichrist and False Prophet will be active on earth at the same time (during the Tribulation Period) ...Revelation clearly says the Beast and false prophet, in this context. Nowhere in the rest of the Bible is the word Beast associated with Antichrist, the latter word used in different contexts.
Luke 21:28 28
“When these things begin to take place, stand up and lift up your heads, because your redemption is drawing near.”
Actually the A/C is referred to about a dozen different names throughout the Bible.
Daniel 7 also refers to them BOTH as “beasts”.