For the one-word prompt FRIEND – I thought of two Bible verses.
Henceforth I call you not servants; for the servant knoweth not what the lord doeth: but I have called you friends; for all things that I have heard of my Father I have made known unto you.
John 15: 15 (KJV)
A man that hath friends must shew himself friendly: and there is a friend that sticketh closer than a brother.
Proverbs 18: 24 (KJV)