Seen is a alternative form of sin.

As nouns the difference between sin and seen

is that sin is a violation of God's will or religious law while seen is the letter س in the Arabic script.

As verbs the difference between sin and seen

is that sin is to commit a sin while seen is past participle of lang=en.

As a proper noun Sin

is the god of the moon in Sumerian mythology.

As an abbreviation SIN

is sinaloa, a state of Mexico.