homoionym

例句：

1. 1. The word "happy" has a homoionym, which is "sad".
   “快乐”这个词有一个同义词，那就是“悲伤”。
2. 2. In the dictionary, homoionyms are listed alongside their synonyms.
   在字典中，同义词和它们的同义词是并列列出的。
3. 3. Homoionyms can be found in many fields of study, including linguistics and psychology.
   同义词可以在许多研究领域中找到，包括语言学和心理学。