orilla, bank, shore, edge.
orla, border, fringe.
oro, gold; de —, golden; el — y el moro (iron.), a fortune.
ortodoxo, orthodox.
os, you, to you.
osadía, audacity, daring.
osado, daring, bold.
osar, to dare.
oscilar, to swing, sway, hover, oscillate.
oscuridad = obscuridad.