Let's start by directing you to one of the best resources out there, the DRJ Glossary. You can find it here: http://www.drj.com/resources/tools/glossary-2.html To answer your question, Crisis Management is primarily focused on responding to an event whereas Business Continuity Management or BCM looks at the organizations business continuity needs more holistically. Crisis Management is a component of BCM but BCM is not necessarily a component of Crisis Management.
~ Patrick Ridder, MBCP, MBCI, CHPCP
ISO 22301 Lead Auditor