ol'igos, few—oligarchy (arche).
or'phanos, deserted—orphan, orphanage.
or'thos, right, straight—orthodox, orthoepy, orthography.
paidei'a, instruction—cyclopædia.
pais, a child—pedagogue, pedant, pedantic, pedobaptist.
pap'as, Lat. papa, a father—papacy, pope, popedom, popery.
paradei'sos, a pleasant garden—paradise.
pat'ein, to walk—peripatetic.
pen'te, five—pentagon, pentecost.
pet'ra, a rock—Peter, petrescent, petrify, petroleum, saltpeter.