This paper describes A Flock of Words, a cross-media music performance realized in collaboration with composer Robert Rowe. An interactive computer system linked large-scale holograms, video projection, animation, robotic lighting effects, and computer music. With a text from Elias Cannetti's Crowds and Power, an artificial-life algorithm animates swarming words. Projected onto the large holograms, the text flies in and out of linear readability, set off by computer music signals. A Flock of Words uses custom computer software to analyze the music being performance by an ensemble of human players and guide the simultaneous projection of real-time animation onto holograms, video, holographic lighting, and computer music. To stage the piece, we created an interactive computer system combining large-scale holograms, video projection, animation, robotic lighting effects, and computer music. The real-time animation was an adaptation of Craig Reynolds's Boids algorithm, which we dubbed `woids', and was used for animating flocking words.