2 sentences

1. 代名词是用来代替名词的词类。

   dài​míng​cí shì yòng​lái dài​tì míng​cí de cí​lèi.

   Pronouns are a category of words used to replace nouns.

   Source: Dong Chinese Dictionary

2. 那个品牌已经成为了高品质的代名词。

   nà gè pǐn​pái yǐ​jīng chéng​wéi le gāo pǐn​zhì de dài​míng​cí.

   That brand has become synonymous with high quality.

   Source: Dong Chinese Dictionary