Clarification

In case you were wondering...
Nerd:
Etymology: perhaps from nerd, a creature in the children's book If I Ran the Zoo (1950) by Dr. Seuss (Theodor Geisel): an unstylish, unattractive, or socially inept person; especially : one slavishly devoted to intellectual or academic pursuits

Geek:
Etymology: probably from English dialect geek, geck fool, from Low German geck, from Middle Low German
1 : a carnival performer often billed as a wild man whose act usually includes biting the head off a live chicken or snake
2 : a person often of an intellectual bent who is disapproved of- geeky /'gE-kE/ adjective


These definitions come from Merriam Webster. The only thing I might add is an additional example for Geek that would go something like this:

1: a carnival performer often billed as a wild man whose act usually includes biting the head off a live chicken or snake. (See Ozzy Osborne).