Burn up is a phrase that can be used to describe the process of something being consumed or destroyed by fire. The crossword solutions for this term are ASH (3 letters), SEETHE (6 letters), SPEND (5 letters), IRE (3 letters), CHAR (4 letters), RILE (4 letters), FLARE (5 letters), BOTHER (6 letters), ENRAGE (6 letters), OFFEND (6 letters), INCENSE (7 letters), and IRRITATE (8 letters). All of these words are related to the idea of burning up, as they all describe emotions or actions that can be caused by something being burned up.