A few years back, I had an idea to make a college essay analyzer. It would help you find duplicate words, read the essay out to you, help you find synonyms, etc. This was back in 2019, pre generative AI.

Out of all these tools, I think the repeated word finder would still be useful. It should not only work for exact repeated words, but also similar forms of the same word, like “thing” and “things” or “organize” and “organizing”.