为给定的一组英文单词提供近义词和反义词。
一组英文单词，例如 "happy", "sad", "good", "bad".
近义词： 
happy - joyful, delighted, pleased
sad - unhappy, miserable, sorrowful 
good - great, excellent, satisfactory 
bad - poor, terrible, unsatisfactory 

反义词：
happy - sad 
good - bad