In some idioms, a constituent may be replaced by a word of the s

In some idioms, a constituent may be replaced by a word of the same part of ( )，resulting in synonymous or antonymous idioms.
【正确答案】：SPEECH
【题目解析】：在有些习语中，其中的一个成分可能被同一词性的词所替代， 结果导致同义或反义习语的产生。答案为speech。