Thrash metal is a subgenre of heavy metal music that originated in the early 1980s. It is characterized by fast tempos, complex guitar riffs, and aggressive vocals. Some synonyms for thrash metal include "speed metal", "power metal", "death metal", "black metal", and "extreme metal". All of these genres share some common elements with thrash metal, such as fast-paced rhythms and aggressive vocals. However, each genre has its own unique sound and style. Some other subgenres that have emerged from thrash metal include "crossover thrash", "groove metal", and "thrashcore". These genres continue to evolve and influence heavy metal music today.