ocarina |ˌɑːkəˈriːnə| — egg-shaped terra cotta wind instrument with a mouthpiece and finger holes

occasion |əˈkeɪʒn| — an event that occurs at a critical time

occasional |əˈkeɪʒənl| — occurring from time to time

occasionalism |əˈkeɪʒənlɪzəm| — (philosophy) A metaphysical doctrine that holds that all events are occasioned (caused) by God himself

occasionally |əˈkeɪʒnəlɪ| — sporadically and infrequently

occasions |əˈkeɪʒənz| — something you have to do

Occident |ˌɑːksəˈdent| — the countries of (originally) Europe and (now including) North America and South America

occidental |ˌɑːkɪˈdentl| — a native inhabitant of the Occident

occidentalism |ˌɒksɪˈdentəlɪzm| — the scholarly knowledge of western cultures and languages and people

occipital |ɑkˈsɪpətəl| — of or relating to the occiput

occiput |ˈɑːksəpʌt| — back part of the head or skull

occlude |əˈkluːd| — block passage through

occlusion |əˈkluːʒn| — closure or blockage (as of a blood vessel)

occlusive  — a consonant produced by stopping the flow of air at some point and suddenly releasing it

occult |əˈkʌlt| — supernatural forces and events and beings collectively

occultation  — one celestial body obscures another

occultism |əˈkʌltɪzəm| — the study of the supernatural

occultness  — The state or condition of being occult.

occupancy |ˈɑːkjəpənsɪ| — an act of being a tenant or occupant

occupant |ˈɑːkəpənt| — someone who lives at a particular place for a prolonged period or who was born there

occupation |ˌɑːkjʊˈpeɪʃn| — the principal activity in your life that you do to earn money

occupational |ˌɑːkjʊˈpeɪʃənl| — of or relating to the activity or business for which you are trained

occupied |ˈɑːkjʊpaɪd| — resided in; having tenants

occupier |ˈɑːkjʊpaɪər| — someone who lives at a particular place for a prolonged period or who was born there

occupy |ˈɑːkjʊpaɪ| — keep busy with

occupying |ˈɑːkjəˌpaɪɪŋ| — Present participle of occupy.

occur |əˈkɜːr| — come to pass

occurence  — Common misspelling of occurrence.

occurrence |əˈkɜːrəns| — an event that happens

occurring |əˈkɜːrɪŋ| — Present participle of occur.

ocean |ˈəʊʃn| — a large body of water constituting a principal part of the hydrosphere

ocean-going |ˌɡəʊɪŋ| — (nautical) Designed and equipped to be capable of sailing on an ocean.

Oceanian |ˌəʊʃɪˈeɪnjən| — From Oceania.

oceanic |ˌəʊʃɪˈænɪk| — an eastern subfamily of Malayo-Polynesian languages

oceanographic |əʊʃənəˈɡræfɪk| — relating to oceanography, the science of oceans

oceanography |ˌəʊʃəˈnɑːɡrəfɪ| — the branch of science dealing with physical and biological aspects of the oceans

ocellus |əˈseləs| — an eye having a single lens

ocelot |ˈɑːsəlɑːt| — nocturnal wildcat of Central America and South America having a dark-spotted buff-brown coat

ocher  — a moderate yellow-orange to orange color

ochlocracy |ɒkˈlɒkrəsɪ| — a political system in which a mob is the source of control; government by the masses

ochre |ˈəʊkər| — any of various earths containing silica and alumina and ferric oxide; used as a pigment

octagon |ˈɑːktəɡɑːn| — an eight-sided polygon

octagonal |ɑːkˈtæɡənl| — of or relating to or shaped like an octagon

octahedral |ˌɑːktəˈhiːdrəl| — Having eight plane surfaces; thus, in the shape or form of an octahedron.

octahedron |ˌɑːktəˈhiːdrən| — any polyhedron having eight plane faces

octal |ˈɒktəl| — of or pertaining to a number system having 8 as its base

octane |ˈɑːkteɪn| — any isomeric saturated hydrocarbon found in petroleum and used as a fuel and solvent

octangular |ɑːkˈtæŋɡjʌlər| — of or relating to or shaped like an octagon

octant |ˈɑːktənt| — a measuring instrument for measuring angles to a celestial body; similar to a sextant but with 45 degree calibration

octarchy |ˈɑːktɑːrkiː| — A government consisting of eight people

octave |ˈɑːktɪv| — a feast day and the seven days following it

octavo |ɑːkˈteɪvəʊ| — the size of a book whose pages are made by folding a sheet of paper three times to form eight leaves

octennial |ɑːkˈteniːəl| — Occurring every eight years.

octet |ɑːkˈtet| — the cardinal number that is the sum of seven and one

octette |ɒkˈtet| — eight performers or singers who perform together

octillion |akˈtɪljən| — the number that is represented as a one followed by 27 zeros

October |ɑːkˈtəʊbər| — the month following September and preceding November

octodecimo |ɑːktəˈdesəməʊ| — (paper, printing) A size of a sheet of paper resulting from folding and cutting a sheet of paper into eighteenths (3.5"-4.5" x 4.9"-5.9").

octogenarian |ˌɑːktədʒəˈnerɪən| — someone whose age is in the eighties

octonary |ˈɒktə(ʊ)n(ə)rɪ| — the cardinal number that is the sum of seven and one

octopus |ˈɑːktəpəs| — tentacles of octopus prepared as food

octoroon |ɑːktəˈruːn| — an offspring of a quadroon and a white parent; a person who is one-eighth black

octosyllabic |ˌɑːktəʊsɪˈlæbɪk| — having or characterized by or consisting of eight syllables

octosyllable |ˈɑːktəʊsɪləbl| — a verse line having eight syllables or a poem of octosyllabic lines

octuple |ˈɑːktʊpəl| — having eight units or components

ocular |ˈɑːkjələr| — combination of lenses at the viewing end of optical instruments

oculist |ˈɑːkjəlɪst| — a person skilled in testing for defects of vision in order to prescribe corrective glasses