Blows a fuse is an expression used to describe a person who has become very angry or frustrated. RAGES (5 letters) is an appropriate synonym for this phrase, as it means to be filled with intense and violent anger. MEESRED (7 letters) is another synonym, which means to become very angry or agitated. SHORTSOUT (9 letters) is the final synonym, which means to suddenly become overwhelmed with emotion or to lose control of one's temper. All three words can be used to describe someone who has blown a fuse.