Open English Wordnet
Nouns
(n)bestthe supreme effort one can make“they did their best” (n)best, topperthe person who is most outstanding or excellent; someone who tops all others“he could beat the best of them” Verbs
Adjectives
(a)best(superlative of ‘good’) having the most positive qualities“the best film of the year”,
“the best solution”,
“the best time for planting”,
“wore his best suit” (s)better, best(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” Adverbs
(r)bestin a most excellent way or manner“he played best after a couple of martinis” (r)bestit would be sensible“you'd best stay at home” (r)better, bestfrom a position of superiority or authority“father knows best”,
“I know better.”