Error is a synonym of Slip. Slip is related to Piece. Piece is related to Amount. Amount is related to Equity. 
Moral is related to Support. Support is related to Base. Base is related to Safe. Safe is a different concept from Risky. 
Error <--Synonym--> Slip <--RelatedTo--> Piece <--RelatedTo--> Amount <--RelatedTo--> Equity 
Moral <--RelatedTo--> Support <--RelatedTo--> Base <--RelatedTo--> Safe <--DistinctFrom--> Risky 