Invisible Oranges had a look at the amazing art of howling and grunting in Death Metal English:
“Like other forms of English, Death Metal English is a tool kit. (…) You can employ Death Metal English in other realms, but it’s designed to make death metal lyrics sound more brutal. Why do DM bands write this way? Perhaps because a few early tastemakers chose to, and everyone else just followed along. Perhaps because all those lengthy words resonate nicely in the front of your face when you utter a death growl. Perhaps because its ponderous diction mirrors the blocky nature of the music.
Some common traits of Death Metal English below:
Big, polysyllabic words: You don’t have to use them correctly; you just have to use them. Bonus points for Greco-Latinate words that end in “-ition,” “-ation,” “-ution,” “-ous,” “-ized,” “-ism,” “-ance,” “-ial,” “-ity,” and variations thereon. Double bonus points for words ending semi-inappropriately in “-ment,” as in “Torn Into Enthrallment.” These words don’t even have to be real. Is Wormed’s “Multivectorial Reionization” a real thing? Who cares?
Adjectives: In Death Metal English, they’re like guitar solos. You aren’t using enough. Add more.
Prepositional phrases: Same is true here, too — the more prepositional phrases, the better. “(-ation word) of the (ominous word)” is perhaps the most brutal of all grammatical constructions, which is why “Procreation (of the Wicked)” is one of the best song titles ever. It also has parentheses, which are a less common but still valued component of Death Metal English.”