BOO:

Build Own Operate (and Maintain).  

BOT:

Build Own Transfer where the project is transferred back to the party granting the concession. The transfer may be for value or at no cost.  

Political risk:

Eight risks usually comprising currency Inconvertibility, expropriation, war and insurrection, terrorism, environmental activities, landowner actions, non-government activists, legal, and bureaucratic/approvals. The first three are insurable. It overlaps with the political component of Force Majeure risk.  

Private Finance Initiative (PFI)

A form of public-private partnership.

Sovereign risk:

The government's part of Political risk.