Synonyms for Worst:

adj.

most wanting (adjective)
least, inferior, lowest.

n.

least meaningful, least, most pitiful, most harmful, most horrible, meanest, least effective, least understanding, most ghastly. subdue, win, subjugate, triumph over, master, ace, go someone one better, lick, surmount, rout, trim. worse (noun)
inferior, degenerate, worst of all, worse, for the worse, extraordinary, impoverished, pale, retrogressive.
worst (noun)
mop up, pessimal, last, rack up, most evil, whip, pip, pessimum, most unsuitable, last-place, poorest, bottom, most wicked, most undesirable, lowest, most unpleasant, most unattractive.

v.

competition (verb)
pip, rack up, mop up, whip.

Other synonyms:

lick. subdue, trim. worse
impoverished, pale, inferior, degenerate, retrogressive, worse.

Usage examples for worst

  1. The worst was when I heard you had been put on the case- no, that wasn't the worst – The Woman in Black by Edmund Clerihew Bentley
  2. But that isn't the worst – Just Patty by Jean Webster
  3. But the worst thing of all was that Peter was lost, had been lost for three days, and now they felt they must give up hope. – Penny Plain by Anna Buchan (writing as O. Douglas)