Spontaneous

Spontaneous may refer to:
 * Spontaneous abortion or miscarriage
 * Spontaneous bacterial peritonitis
 * Spontaneous combustion
 * Spontaneous declaration
 * Spontaneous emission
 * Spontaneous fission
 * Spontaneous generation
 * Spontaneous human combustion
 * Spontaneous Music Ensemble
 * Spontaneous order
 * Spontaneous process
 * Spontaneous remission
 * Spontaneous symmetry breaking
 * Spontaneous (album) by William Parker & the Little Huey Creative Music Orchestra
 * Spontaneous (film), an American romantic black comedy horror film