给定一组英文单词，将它们转换为它们的同义词或类似词。 
happy, sad, angry, excited, bored
happy: joyful, pleased, delighted
sad: unhappy, sorrowful, depressed 
angry: furious, irate, indignant 
excited: thrilled, stimulated, enthusiastic 
bored: uninterested, disinterested, indifferent