The term 'rose up suddenly' can be summarized by the crossword solution 'LOOMED, ' which is a six-letter word. To loom means to appear or emerge in a large or impressive form, often suddenly. This term is often used to describe a situation where something appears unexpectedly and with great force. In this case, the term 'rose up suddenly' could be used to describe a situation where something appears out of nowhere and with great force.