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)