Synonyms of frightful

1 Syllable

vile, lewd, dread, great, bad, wrong, lou, grim

2 Syllables

dreader, grisly, sickie, heinous, monstrous, ghastlier, grimmer, ugliest, uglier, morbid, annoying, grimmest, spookish, wicked, dreadful, ghastly, awful, shocking, hideous, mondo, ugly, whaler

3 Syllables

ferocious, tremendous, extreme, alarming, gruesome, ghostlike, terrible, terrific, fearsome, tigerish, bad-looking, teratoid, appalling, macabre, horrible, sleazeball, unpleasant, horrendous, disgusting, horrific, miscreated

4 Syllables

unspeakable, disagreeable, unalluring, hard-featured, unbeautiful, formidable, calamitous

5 Syllables

unattractive, undescribable, insufferable, unprepossessing, unutterable, inexpressible, indefinable

6 Syllables

incommunicable