These six things encompass the plan of salvation. The Hebrew for transgression, pesha', means rebellion . Rebellion is at the surface. It is something we consciously do. The word for sin, chatta'ah, comes from a root meaning to miss the mark .
Sin is transgression of the law but it is failure rather than rebellion.
The word for iniquity, awvone', means guilt and perversity . It can be a domino effect. Jesus' atonement deals with every aspect.