flat-out

Synonyms

absolute, all-out, arrant, blank, categorical (also categoric), clean, complete, consummate, cotton-picking, crashing, dead, deadly, definite, downright, dreadful, fair, flat, out-and-out, outright, perfect, plumb, profound, pure, rank, regular, sheer, simple, stark, straight-out, thorough, thoroughgoing, total, unadulterated, unalloyed, unconditional, unmitigated, unqualified, utter, very;

Near Antonyms

doubtful, dubious, equivocal, qualified, questionable, restricted, uncertain;

Related Words

authentic, classic, genuine, real, veritable;

constant, endless, eternal, perpetual, undying, unremitting;

extreme, unrestricted;

confirmed, habitual, hopeless, inveterate;

extraordinary, frightful, horrible, huge, main, superlative, supreme, surpassing, terrible, terrific;