ventriloquy means ventriloquism. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Why “ventriloquy” is a great word
The art of making one's voice appear to originate from a separate, distant, or inanimate source. From the Latin ventriloquium, from venter ('stomach, belly') + loquī ('to speak'). Unlike the modern theatricality of 'ventriloquism,' with its polished dummy and waggling jaws, or the harmonic complexity of 'polyphony,' with its interwoven melodic lines, ventriloquy is the primal craft of vocal dislocation. It is the uncanny murmur from a darkened corner, the whispered secret that seems to issue from a stone idol, or the child's conviction that a beloved doll speaks from its own silent heart—a performed schizophrenia that makes the very air seem possessed by another's thought, a testament to our longing to find sentience in the void.
Etymology
From Latin ventriloquium, from venter (“stomach”) + loquī (“to speak”).