Kho Chữ

Kho Chữ is a free Vietnamese thesaurus website for people who already read Vietnamese and want better word choice. It is most useful for writers, translators, and upper beginner to advanced learners who want to compare near-synonyms instead of just checking a basic definition.

Each entry groups words by meaning and part of speech, then shows related words and short example lines. On indexed pages such as cháy, you can move through different senses of the same word and see long synonym lists rather than a single gloss. That makes it handy when you are revising a sentence or trying to notice nuance across similar words.

What it does well is breadth. You can browse quickly and pick up vocabulary clusters that are harder to get from a standard learner dictionary. The downside is that it is not built like a step by step course. There are no lessons, speaking practice, or beginner style explanations, so you need some Vietnamese already. If that matches your level, Kho Chữ can be a useful reference tool to keep open while you read or write.