Escalation
The risk or opportunity is outside of the project scope and is escalated to management.
Avoidance
Avoid the risk
Mitigation
Reduce the probability or impact of the risk event.
Acceptance
The risk may be small so the risk may be accepted.
Transference
Risk ownership is transferred to third party, usually for a fee.
Enhance
A positive risk strategy to increase the probability / impact of the opportunity for the project.
Exploit
A positive risk that a projet wants to take advantage of.
Share
A positive risk that can be shared with the organization or other project.