“Strive (pursue) for peace with everyone, and for holiness without which no one will see the Lord.”  Hebrews 12:14

Peace here is a noun: EIRENE in the Greek and is defined ‘harmonious relationships between men and between nations, friendliness, freedom from molestation, rest.’  “Vine’s Expository Dictionary of Old and New Testament Words”.

Of this peace, Mark 9:50 says,
“Salt is good, but if the salt has lost its saltiness, how will you make it salty again?  Have salt in yourselves, and be at peace with one another.”

“If possible, so far as it depends on you, live peaceably with all.”  
Romans 12:18

“So then let us pursue what makes for peace and for mutual upbuilding.”  Romans 14:19

“But the wisdom from above is first pure, then peaceable, gentle, open to reason, full of mercy and good fruits, impartial and sincere.
And a harvest of righteousness is sown in peace by those who make peace.”
James 3:17-18

Holiness in our opening verse opened up in a way that surprised me.
In Vine’s dictionary the Greek word for holiness is HAGIASMOS and is rendered ‘sanctification’. 

Turning again to Vine’s dictionary, the Greek word for sanctification is HAGIASMOS and is defined as the course of life befitting those so separated.

So it isn’t any surprise that the cross reference verses of Scripture listed under each are the same depending on the translation you are using.  Here are two examples. You can make a personal check in some of your translations.
 Paul in Romans 6:19,
“…For just as you once presented your members as slaves to impurity and to lawlessness, so now present your members as slaves to righteousness leading to sanctification (ESV)  holiness (NKJV).”

1 Thessalonians 4:7,
“For God has not called us for impurity, but in holiness (EVS) sanctification (NASV).”

Let’s see what Scripture opens up to us in holiness/sanctification in our  opening verse.
“Since we have these promises, beloved, let us cleanse ourselves from every defilement of body and spirit, bring holiness to completion in the fear of God.”  2 Corinthians 7:1  (Read 2 Corinthians 6:16-17 for the promises Paul is speaking of.)

“As obedient children, do not be conformed to the passions of your former ignorance ,
but as He who called you is holy, you also be holy in all your conduct,
since it is written, ‘You shall be holy, for I am holy.’” 1 Peter 1:14-16

“Since all these things are thus to be dissolved, what people ought you to be in lives of holiness and godliness.”  2 Peter 3:11  (Read Chapter 3)

“And now why are you waiting?  Arise and be baptized, and wash away your sins, calling on the name of the Lord.”  Acts 22:16

Thank you Father for the Word, Jesus, and thank you, Holy Spirit who opens the Scriptures up to us.  All praise and glory are to God alone.  Amen