Hardcore
Hardcore can be used to describe a number of genres including: 1) The genre of hardcore punk as well as its various offshoots and derivatives. It can also be used as an adjective rather than a genre, often to describe a metalcore band that sounds heavier or more "hardcore" than other bands. 2) A genre of electronic music, with has some characteristics like being harder than the other electronic music genres and the songs having higher bpms, sometimes called hardcore techno or gabber.
Genres
