I made this because I'm really interested in how similar words relate to one another. I used NLP to convert written etymology paragraphs from wiktionary into a database of words and connections.

The most interesting thing has been finding Proto-Indo-European roots, like "h₂enh₁", which is a 10k-year-old reconstructed word meaning "breath", that has about 1k modern day descendants ranging from "nose" to "anemone".