Synonyms of hellish in English:

hellish


See definition of hellish

adjective

1‘the hellish face of Death’

SYNONYMS
infernal, Hadean
devilish, diabolical, diabolic, fiendish, satanic, demonic, demoniac, demoniacal, Mephistophelian, ungodly, evil, wicked
Stygian
rare cacodemonic
ANTONYMS

godly, angelic

2‘it had been a hellish week’

SYNONYMS
horrible, rotten, awful, terrible, dreadful, ghastly, horrid, vile, foul, abominable, appalling, atrocious, horrendous, frightful
difficult, unpleasant, nasty, disagreeable
stressful, taxing, demanding, trying, tough, hard, heavy, pressured, testing, frustrating, fraught, traumatic, arduous, tiring, gruelling
informal murderous, a bitch of a, a stinker of a, a bummer of a, from hell
British informal grotty, beastly
North American informal hellacious, lousy
ANTONYMS

wonderful, easy


adverb

1‘it's hellish hard work’

SYNONYMS
very, extremely, exceedingly, exceptionally, extraordinarily, tremendously, immensely, hugely, intensely, acutely, uncommonly, unusually, decidedly, particularly, remarkably, really, truly, mightily, thoroughly
all that, to a great extent, to a fault, in the extreme, most, so
Scottish unco
très
Northern English right
informal terrifically, awfully, fearfully, terribly, devilishly, majorly, seriously, mega, ultra, oh-so, stinking, mucho, damn, damned
informal, dated devilish, frightfully
British informal ever so, well, bloody, dead
North American informal real, mighty, powerful, awful, plumb, darned, way, bitching
South African informal lekker
archaic exceeding
ANTONYMS

moderately