The opposite of unrighteousness, all unrighteousness is sin. So righteousness is the opposite of sin.
I don't know of a word in specific, but righteousness are all the "
good deeds" the righteous practise:
1 John 3:7 Little children, let no man deceive you: he that
doeth righteousness is righteous, even as he is righteous.
-Here are some examples:
Matthew 5:7 Blessed are the
merciful: for they shall obtain mercy.
8 Blessed are the
pure in heart: for they shall see God.
9 Blessed are the
peacemakers: for they shall be called the children of God.
39But I say unto you, That ye resist not evil: but whosoever shall smite thee on thy right cheek, turn to him the other also.
40 And if any man will sue thee at the law, and take away thy coat, let him have thy cloak also.
41 And whosoever shall compel thee to go a mile, go with him twain.
42 Give to him that asketh thee, and from him that would borrow of thee turn not thou away.
44 But I say unto you,
Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
48 Be ye therefore
perfect, even as your Father which is in heaven is perfect.
Matthew 6:14 For if ye
forgive men their trespasses, your heavenly Father will also forgive you:
Isaiah 1:16 Wash you, make you clean; put away the evil of your doings from before mine eyes; cease to do evil;
17 Learn to do well; seek judgment, relieve the oppressed, judge the fatherless, plead for the widow.
1 John 4:21 And this commandment have we from him, That
he who loveth God love his brother also.