a.
1.
Of hell.
2.
Infernal, diabolical, fiendish, devilish, demoniacal, fiend-like, atrocious, detestable, abominable, execrable, nefarious, curst, accursed, damnable, damned, monstrous.
HELLISH
Meaning of HELLISH in English
Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012