Contradiction with John 14:6
2 Peter 1:11 suggests an "abundant entrance" into the everlasting kingdom, whereas John 14:6 emphasizes Jesus as the only way to the Father, potentially contrasting notions of the means of entering the kingdom.
John 14:6: Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
Contradiction with Matthew 7:13-14
These verses describe the way to life as narrow and difficult, which might contrast with the "abundant entrance" described in 2 Peter 1:11.
Matthew 7:13-14: Enter ye in at the strait gate: for wide [is] the gate, and broad [is] the way, that leadeth to destruction, and many there be which go in thereat: [strait: or, narrow]
Contradiction with Romans 3:23
This verse speaks about all having sinned, which contrasts with the idea of an abundant entrance into the kingdom, implying a need for grace rather than earned or abundant rewards.
Romans 3:23: For all have sinned, and come short of the glory of God;
Contradiction with Ephesians 2:8-9
These verses emphasize salvation by grace through faith, not works, which might contradict the idea implied in 2 Peter 1:11 of having an "abundant entrance" based on the preceding diligent behaviors.
Ephesians 2:8-9: For by grace are ye saved through faith; and that not of yourselves: [it is] the gift of God:
Contradiction with Matthew 19:24
Suggests the difficulty for a rich man to enter the kingdom, potentially contradicting the notion of an "abundant entrance" in 2 Peter 1:11.
Matthew 19:24: And again I say unto you, It is easier for a camel to go through the eye of a needle, than for a rich man to enter into the kingdom of God.
Contradiction with Philippians 3:12-14
Paul speaks about not having already obtained perfection, suggesting a continual striving that contrasts the assuredness of 2 Peter 1:11's abundant entrance.
Philippians 3:12-14: Not as though I had already attained, either were already perfect: but I follow after, if that I may apprehend that for which also I am apprehended of Christ Jesus.
Contradiction with Hebrews 4:1
Warns about the possibility of falling short of God's rest, which contrasts with the confidence of a rich entrance suggested by 2 Peter 1:11.
Hebrews 4:1: Let us therefore fear, lest, a promise being left [us] of entering into his rest, any of you should seem to come short of it.