Other forms: logophiles
Someone who loves words is a logophile. If an interesting vocabulary word sends you to the dictionary to learn more about it (including its etymology), you just might be a logophile.
Logophiles have a deep interest in words and enjoy adding new ones to their vocabulary. You can call yourself a logophile if you're fascinated by unusual words or get a kick out of digging into a word's origin to see how it relates to other words. In fact, a true logophile would be very interested to know that the word derives from the Greek logos, "word," and philos, "loving."