There are currently 16 names in this directory beginning with the letter O.
oar
FORCE
or
NORTH
oral
FORCE
orb
NORTH
orbit
NORTH
orchestra
NORTH
orchid
NORTH
order
NORTH
ordinary
NORTH
ore
FORCE
organ
NORTH
organism
NORTH
organize
NORTH
ornament
NORTH
Ornery
Meaning mean, ill-tempered, or stubborn. Derived from "Ordinary." Still common today in the Southern United States. Apparently part of the NORTH lexical set.
Thanks to Dominic Mitchell for this submission!