You can search words by the affixes they contain, find cognates, derivatives, and more, all information that is available but otherwise latent in Wiktionary.
And you can search words by meaning, language(s) of origin, part of speech, and much more. Hoping to continue to improve the dataset and have an updated and accurate English etymology database.
I have not (of course) personally validated all of the data, but the presentations on the site are relatively conservative.