Is a cyclone worse than a tornado?

It varies. Technically a cyclone can be almost any large scale low pressure system with a closed circulation, and most such systems are not damaging. However, hurricanes and similar storms, which are a kind of cyclone, can cause far more damage and have much higher death tolls than tornadoes. Both the costliest and deadliest natural disasters in U.S. history were hurricanes (Hurricane Katrina and the 1900 Galveston hurricane respectively). It can be even more complicated however, as cyclones can cause tornadoes.