[kerryusama04]

1Co 15:13 But if there be no resurrection of the dead, then is Christ not risen:

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 years.

1Co 15:12 Now if Christ be preached that he rose from the dead, how say some among you that there is no resurrection of the dead?

1Co 15:14 And if Christ be not risen, then is our preaching vain, and your faith is also vain.

[DaveMSmith]

'Dead' refers to the unregenerate or spiritually dead. Resurrection is synonymous with regeneration or in the Lord's case, His Glorification.