Principal
The face amount or par amount of a bond, not including interest, payable on its maturity date.
A remedy sometimes available under an Indenture, Bond Resolution or other financing document which permits the Trustee or bondholder to declare all future payments of Principal immediately due and payable after the occurrence of certain specified Events of Default.
The face amount or par amount of a bond, not including interest, payable on its maturity date.
Breach of a covenant, promise or duty imposed by the bond, bond resolution/ordinance, an indenture or other financing document.

The difference between the amount an underwriter pays the issuer for the bonds at the closing (i.e., the purchase price) and the price at which the underwriter sells the bonds to the public (i.e., the issue price).