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3000 ECPE Vocabulary (O P)

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oasis
oath
obedient
objective
obligated
obligatory
oblige
oblivious
obscene
obscure
obsess
obsession
obsolete
obstacle
obstruct
obtain
occasional
occasionally
occupant
occupy
occur
odd
odds
odor
odyssey
offence
offend
offshore
offspring
olfactory
omen
ongoing
ooze
opponent
opposite
optical
optimal
optimism
optimist
optimum
optional
oral
oratorio
orbit
orbital
orchestra
orchid
ordeal
orderly
ore
organ
organic
organism
oriental
origin
original
originality
ornament
ounce
outbreak
outcast
outcome
outcry
outdated
outdoors
outgoing
outlast
outlaw
outlet
outline
outlook
outlying
outmoded
output
outrage
outright
oval
overall
overbalance
overburden
overcharge
overdue
overestimate
overhaul
overhear
overlap
overlapping
overload
overlook
override
overrun
overseas
oversee
oversight
overt
overtire
overturn
ownership
oyster
ozone
pack
packaging
paddle
paddler
pageant
painstaking
pale
paleontologist
pamphlet
pane
panic
pants
parachute
parade
paragraph
parallel
paralysis
paralyze
paranoia
paraphrase
parapsychology
parasite
parasitic
parliament
partial
participant
participate
particle
passion
passionate
passive
pasture
patent
path
pathway
patio
patriot
patroller
patron
patronage
paucity
pauper
pavement
peak
pebble
peck
peculiar
pedagogic
pedagogical
pedagogy
pedal
peer
penal
penalty
penchant
pendant
penetrate
penetrating
pension
perceive
perception
percolate
percussion
perennially
perfume
peril
perimeter
period
periodic
periodical
peripheral
perish
perishable
permanent
permeable
permeate
perpendicular
perpetual
perpetuate
perplexing
perspiration
perspire
pertinent
perverse
pervert
pest
pestilential
petal
petition
petrifaction
petroleum
pharmaceutical
pharmacy
phenomenon
philology
photograph
photosensitive
photosynthesis
physical
physiological
picturesque
pierce
pigment
pilgrim
pillar
pimple
pinch
pinpoint
pioneer
pique
plagiarism
plain
planetarium
plantation
plaster
platform
plausible
playwright
pledge
plight
plow
plump
plunge
pocketbook
poke
polar
polarize
polish
politics
poll
pollination
pollutant
pollute
ponder
popcorn
popular
popularity
porcelain
porcupine
pore
portable
portfolio
portion
portrait
portraitist
pose
possess
postage
postal
poster
postgraduate
postmaster
posture
pot
potent
potted
pottery
pounce
pound
poverty
practically
prairie
preach
precarious
precaution
precedence
precedent
precious
precipitate
precipitation
precise
predatory
predict
predictability
predictable
prediction
predictive
predominant
predominantly
preeminent
prejudice
preliminary
premature
premium
preoccupation
preponderance
prerequisite
prerogative
prescribe
prescribed
prescription
presence
preservative
preserve
presidency
pressure
prestige
prestigious
presumable
presumably
pretentious
prevail
prevailing
prevalent
prey
primal
primary
primitive
priority
pristine
privilege
probe
proceeding
proceeds
prod
prodigy
productive
profession
proficiency
proficient
profile
profound
progress
progression
prohibitive
projection
projectionist
projector
proliferation
prolific
prolong
prominence
promising
promote
promoter
prompt
promulgate
prone
proofread
propaganda
propellant
propensity
prophecy
prophet
proponent
proportion
proposal
propose
proprietor
propulsion
prosecute
prospect
prospector
prosperous
protagonist
protein
prototype
provincialism
provision
provocation
provoke
proximity
proxy
psychiatry
psychology
publication
publicity
publish
puddle
pulp
pumpkin
puncture
pungent
purified
purify
purity

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