Are the terms "The Church" and "The Kingdom" often refering to the same thing?
Move your cursor over each of the scriptures to find out.

Hebrews 12:28

Identifying Mark  Kingdom  Church
Used interchangeably  Mt 16:19  Mt 16:18
Both are comprised of saints  Col 1:13  Col 1:2
Both are blood-purchased  Rev 5:9-10  Acts 20:28
Both are comprised of priests  Rev 1:6,9; 5:9,10  1 Tim 3:15,1 Pet 2:5
The terms of entrance  Jn 3:5  Eph 5:26, Titus 3:5
The memorial supper  Mt 26:26-29  1 Cor 11:20-27
The glory and exaltation  Isa 2:2,3  Eph 3:21
The time of deliverance  1 Cor 15:24  1 Thess 4:16,17
Both have the same owner  Jn 18:36  Mt 16:18
Christians are in both  Rev 1:6  Rev 1:4
God to establish Davidís throne  2 Sam 7:12-16  Acts 2:29ff, Heb 1:1ff
Word to go forth from Jerusalem  Isa 2:2,3  Lk 24:47
Established in the latter days  Isa 2:2,3  Acts 2:17-47
All nations shall flow into it  Isa 2:2,3  Mk 16:15,16
The time of establishment  Dan 2:44  Mk 1:15; Lk 3:1
Ruler over its inhabitants  1 Tim 6:15  Eph 5:23
Reward for the faithful  Mt 25:31-34  1 Cor 15:58

The conclusion is obvious. The church and kingdom in this present age have the same owner, ruler, terms of admission, membership, memorial supper, etc. In this present time period on the earth, they are identical. The same group of people who follow the same Lord are identified from two different perspectives. Passages like Colossians 1:13; Revelation 1:6; 1:9; 5:9-10 along with many others make it abundantly clear that the promised Old Testament kingdom is now in existence! If one denies this, then he is saying Jesus was in error in Mark 1:14,15 and 9:1.

Author Unknown
Firm Foundation