Thesaurus

Synonyms for Worst include:

abominable, atrocious, awful, bad, base, bottom, bum, bush, bush-league, cheap, cheapjack, cheesy, chintzy, coarse, coarsened, commercial, common, corked, corky, crappy, crummy, deplorable, disobedient, distressing, dreadful, evil, execrable, fearful, flimsy, frightful, hard, hopeless, horrid, icky, ill, incompetent, inferior, lamentable, last, last-place, less, lousy, low-grade, lowest, mediocre, mischievous, miserable, naughty, negative, no-good, painful, pessimal, pessimum, pitiful, poor, pretty, punk, ropey, ropy, rotten, rubber, sad, scrawny, scrubby, second-class, second-rate, severe, shoddy, sleazy, sorry, stinking, stinky, stunted, swingeing, tawdry, terrible, third-rate, tinny, tough, uncool, unfavorable, unfavourable, unskilled, unspeakable, unsuitable, utility, utility-grade, woeful, worse, worst, wretched

worst is a ADJ.

mop up, pip, rack up, whip, worst

worst is a VERB.