"Two thousand words" in Engpsh is "two thousand words".
It comes from the combination of the number "two" and "thousand" which indicates a large number.
For example:
I need to write a two thousand words essay by tomorrow. (我需要在明天前写一篇二千字的文章)
His vocabulary is very impressive, he knows over two thousand words. (他的词汇量非常令人印象深刻，他知道超过两千个单词)