1.
[syn: awful, dire, direful, dread(a), dreaded, dreadful, fearful, fearsome, frightening, horrendous, horrific, terrible]
The Collaborative International Dictionary of English v.0.48:
Horrendous \Hor*ren"dous\, a. [L. horrendus.]
Fearful; frightful. [Obs.] --I. Watts.
[1913 Webster]
WordNet (r) 3.0 (2006):
horrendous
adj 1: causing fear or dread or terror; "the awful war"; "an
awful risk"; "dire news"; "a career or vengeance so
direful that London was shocked"; "the dread presence of
the headmaster"; "polio is no longer the dreaded disease
it once was"; "a dreadful storm"; "a fearful howling";
"horrendous explosions shook the city"; "a terrible
curse" [syn: awful, dire, direful, dread(a),
dreaded, dreadful, fearful, fearsome,
frightening, horrendous, horrific, terrible]
Moby Thesaurus II by Grady Ward, 1.0:
36 Moby Thesaurus words for "horrendous":
appalling, astounding, atrocious, awe-inspiring, awesome, awful,
baneful, beastly, dire, direful, dread, dreaded, dreadful, fell,
formidable, ghastly, ghoulish, grim, grisly, gruesome, hideous,
horrible, horrid, horrific, horrifying, macabre, morbid,
redoubtable, rotten, schrecklich, shocking, terrible, terrific,
tragic, tremendous, unspeakable