O'PTICAL, _a._ relating to the science of optics
O'PTICS, _s._ the science of the nature and laws of vision
O'PULENT, _a._ rich
O'RACLE, _s._ something delivered by supernatural wisdom; the place where, or persons of whom, the determinations of heaven are inquired
O'RAL, _a._ delivered by mouth; not written
O'RATOR, _s._ a public speaker; a man of eloquence
O'RBIT, _s._ a circle; path of a heavenly body
O'RCHARD, _s._ a garden of fruit trees
O'RCHIS, _s._ a kind of flowering plant
O'RDER, _s._ method; regularity; command; a rank or class; rule
O'RDINANCE, _s._ law; rule; appointment
O'RDINARY, _a._ established; regular; common; of low rank
O'RDNANCE, _s._ cannon; great guns
O'RGAN, _s._ natural instrument: as the tongue is the organ of speech. A musical instrument
ORGA'NIC, _a._ consisting of various parts co-operating with each other
O'RGANISM, _s._ organic structure
O'RIENT, _a._ eastern; oriental; bright; gaudy
ORI'GINAL, _a._ primitive; first
O'RNAMENT, _v.a._ embellish; decorate
OSCILLA'TION, _a._ the act of moving backward or forward like a pendulum
O'SSEOUS, _a._ bony; resembling bone
OSTENTA'TION, _s._ outward show; pride of riches or power
OSTRICH, _s._ a large bird
OTHERWISE, _ad._ in a different manner; by other causes; in other respects
OU'TLET, _s._ passage outward
OU'TSET, _s._ setting out; departure
OU'TWARD, _a._ external; opposed to _inward_.
OVERFLO'W, _v.a._ deluge; drown; overrun; fill beyond the brim
OVERTA'KE, _v.a._ catch anything by pursuit; come up to something going before
OVERTHRO'W, _v.a._ turn upside down; throw down; ruin; defeat; destroy
OVERWHE'LM, _v.a._ crush underneath something violent and weighty; overlook gloomily
PACI'FIC, _a._ mild; gentle; appeasing
PA'LACE, _a._ a royal house
PA'LTRY, _a._ worthless; contemptible; mean
PA'RADISE, _s._ the blissful region in which the first pair were placed; any place of felicity
PA'RALLEL, _a._ extending in the same direction; having the same tendency
PARALLE'LOGRAM, _s._ in geometry, a right-lined four-sided figure, whose opposite sides are parallel and equal
PA'RAPET, _s._ a wall breast high
PA'RCEL, _s._ a small bundle; a part of a whole
PA'RDON, _s._ forgiveness
PARO'CHIAL, _a._ belonging to a parish
PARO'TIDA-SA'LIVART, _a._ glands so named because near the ear
PA'RTICLE, _s._ any small quantity of a greater substance; a word unvaried by inflection
PARTICULAR, _s._ a single instance; a minute detail of things singly enumerated. IN PARTICULAR, peculiarly; distinctly
PARTICULARLY, _ad._ in an extraordinary degree; distinctly
PA'SSAGE, _s._ act of passing; road; way; entrance or exit; part of a book
PA'SSENGER, _s._ traveller; a wayfarer; one who hires in any vehicle the liberty of travelling
PA'SSIONATE, _a._ moved by passion; easily moved to anger
PA'SSIVE, _a._ unresisting; suffering; not acting