arresting, clear, distinct, dramatic, emphatic, evident, eye-catching, marked, notable, noticeable, outstanding, plain, prominent, remarkable, salient, showy, splashy

absolute, arrant, downright, out-and-out, outright, sheer, stark, utter

detectable, discernible (also discernable), observable, perceptible, visible

abominable, atrocious, awful, deplorable, execrable, heinous, lousy, monstrous, outrageous, preposterous, shameful, shocking, terrible, wretched