optimista, a. and s., optimistic; optimist
opuesto, -a, opposed, contrary
oración, prayer
orden, f., order, command
orden, m., orderliness, order (rotation), class;
en —— a, in order to
ordenado, -a, orderly, peaceful
ordenanza, f., order
ordenanza, m., orderly
ordenar, to order
ordeñar, to milk