| Redoubtable (a.) Formidable; arousing dread; terrible to foes; as, a redoubtable hero; hence, valiant; -- often in contempt or burlesque. Thesaurus Entries appalling, astounding, awe-inspiring, awesome, awful, celebrated, dire, direful, distinguished, dread, dreaded, dreadful, eminent, famed, fell, formidable, frightful, ghastly, ghoulish, great, grim, grisly, gruesome, hideous, horrendous, horrible, horrid, horrific, horrifying, illustrious, macabre, morbid, notable, prominent, renowned, schrecklich, shocking, terrible, terrific, tremendous |