best
noun
the supreme effort one can make
“they did their best”
Oppositesworstthe person who is most outstanding or excellent; someone who tops all others
“he could beat the best of them”
SynonymstopperCanadian physiologist (born in the United States) who assisted F. G. Banting in research leading to the discovery of insulin (1899-1978)
verb
get the better of
“the goal was to best the competition”
adjective
(superlative of `good') having the most positive qualities
“the best film of the year”
“the best solution”
Oppositesworst(comparative and superlative of `well') wiser or more advantageous and hence advisable
“it would be better to speak to him”
“the White House thought it best not to respond”
Synonymsbetter
adverb
in a most excellent way or manner
“he played best after a couple of martinis”
it would be sensible
“you'd best stay at home”
from a position of superiority or authority
“father knows best”
“I know better.”
Synonymsbetter
Source: WordNet 3.1, Princeton University