Unit 10
opt
optimistic
option
optional
orbit
orderly
organization
orient
oriental
orientation
origin
original
originate
ornament
orthodox
outbreak
outcome
outfit
outline
outlook
output
outrage
outset
outstanding
overall
overcome
overflow
overhear
overlook
overpass
overseas
overtake
overthrow
overtime
overturn
overwhelm
overwhelming
owing
pace
pact
pad
painful
panel
panic
parade
parallel
paralyse
partial
participate
particle
passion
passive
passport
paste
pastime
pat
patch
patent
pathetic
patriotic
pave
peak
peculiar
peel
peep
peer
penalty
penetrate
perceive
percentage
perfection
performance
periodical
perish
permanent
permeate
perpetual
perplex
persecute
persevere
persist
personality
personnel
perspective
pessimistic
petition
phase
physical
pierce
pinch
pirate
pitch
plague
plastic
plausible
plea
plead
pledge
plentiful
plight
plot
plug
plunge
plus
poison
poisonous
poke
policy
polish
poll
pollute
ponder
pop
portable
portion
portray
pose
positive
possess
possibility
postpone
posture
potential
poverty
powerful
practically
pray
preach
precaution
precede
precedent
preceding
precise
preclude
predict
predominant
preface
preferable
preference
pregnant
prejudice
preliminary
premise
premium