I guess this is pretty useful in a pinch, but I'd much rather just run grep on my local dictionary file (/usr/share/dict/words on macOS), so I'm not limited in the number of matches or the HTML interface. The one thing that I can't do is parts of speech matching, but that's easy to solve by finding a file online that labels words correctly.

I usually reach for Python's NLTK, but if performance was an issue, and accuracy less important, I can see myself using this.

Is there a way to access it by curl?