omitir, to omit.
omnipotencia, f., omnipotence.
once, eleven.
ópera, f., opera.
opinión, f., opinion.
oponerse á, to oppose.
oportunidad, f., opportuneness.
oportuno -a, proper, opportune.
oprimir, to press, oppress.
opuesto -a (past part. of oponer), opposed, opposite; lo opuesto, opposites, that which is opposite.