words that look like they're related but are actually completely unrelated are interesting
like the words isle and island, which mean the same thing but have completely different roots (isle is from latin insula, island from germanic iland; the s was added to island by analogy)
or the word emoji and various english words like emoticon, emote, emotion (emoji is e-moji, with the e for electronic as in email, and moji is the japanese word for symbol)
also between different languages, like english much and spanish mucho are completely unrelated etymologically speaking, but they mean the same (or at least very similar) and at a glance would appear to be closely related
https://en.wikipedia.org/wiki/False_cognate this has a bunch of them! several we didn't even know about
also it reminded me that Mbabaram, an (unfortunately recently extinct) aboriginal australian language, has the word "dog" for what we in english call a "dog", completely by coincidence
