Is there a difference? Blogger burrsettles believes the terms “are related, but capture different dimensions of an intense dedication to a subject”:
geek – An enthusiast of a particular topic or field. Geeks are “collection” oriented, gathering facts and mementos related to their subject of interest. They are obsessed with the newest, coolest, trendiest things that their subject has to offer.
nerd – A studious intellectual, although again of a particular topic or field. Nerds are “achievement” oriented, and focus their efforts on acquiring knowledge and skill over trivia and memorabilia.
After running some statistical analysis based on Twitter data, he reaches a conclusion about the language each group tends to use:
In broad strokes, it seems to me that geeky words are more about stuff (e.g., “#stuff”), while nerdy words are more about ideas (e.g., “hypothesis”). Geeks are fans, and fans collect stuff; nerds are practitioners, and practitioners play with ideas.
(Hat tip: Ed Yong)
The Dish 