12-Letter Words Starting with O

Oafishness

""OBDURATE to become hard-hearted, also OBDURE""

Objectivism

Objectivist

Oblateness

OBLIGING oblige

Obliterator

Roughly Sobers admits VAT is charged for examinations

Measurements from an experiment soon vibrates all over the place

""The state of being obsolete, or no longer used; a state of desuetude.""

Drunken bore's posture becomes unruly

Sober posture (anagram) - unruly

Noisy, hard to control

Obstructive

Obtuseness

Oceanology

Ochlocracy

Octapeptide

Odiousness

Officialese

Offishness

OLEORESIN A natural mixture of a terebinthinate oil and a resin.

Oligochaete

Oligophagy

Oligopsony

Omnipotence

Omniscience

Opalescence

Opaqueness

OPERATOR one that {operates=v}

The quality or state of being opposite.

Optimality

Optometrist

Arranges music

Narrow passages for killer whales (wordplay)

""Pertaining to, or resembling, a natural order (Orchidace\'91) of endogenous plants of which the genus Orchis is the type. They are mostly perennial herbs having the stamens and pistils united in a single column, and normally three petals and three sepals, all adherent to the ovary. The flowers are curiously shaped, often resembling insects, the odd or lower petal (called the lip) being unlike the others, and sometimes of a strange and unexpected appearance. About one hundred species occur in the United States, but several thousand in the tropics. Orchidace\'91) of endogenous plants of which the genus Orchis is the type. They are mostly perennial herbs having the stamens and pistils united in a single column, and normally three petals and three sepals, all adherent to the ovary. The flowers are curiously shaped, often resembling insects, the odd or lower petal (called the lip) being unlike the others, and sometimes of a strange and unexpected appearance. About one hundred species occur in the United States, but several thousand in the tropics.""

Commonly encountered; usual. See Synonyms at common .

Organicity

Organology

Orientalism

Orientalist

Orientalize

Orientation

Orismology

Ornateness

Orneriness

Ornithopter

Pl. oropharynges (-f -r n j z) or oropharynxes The part of the pharynx between the soft palate and the epiglottis.

Oropharynx

Orotundity

Orthocenter

Plural or third person singular

""Biology progressive evolution, leading to the development of a new form, as can be seen through successive generations. See also society . ; orthogenetic , adj . Evolution the sociological theory that all cultures or societies follow the same fixed course of determinate evolution. See also evolution . ; orthogenetic,""

The treatment of bone and muscle disorders

Rum do, as her topic is a medical speciality

Orthopedist

Orthopteran

Osmolality

Osmolarity

Ostentation

Given to showy display

Gaudy and garish

Showy and vulgar

OSTEOGEN a substance from which bone is formed

OSTEOGEN a substance from which bone is formed

Osteologist

Osteopathy

""Pl. osteoporoses (-s z) A disease in which the bones become extremely porous, are subject to fracture, and heal slowly, occurring especially in women following menopause and often leading to curvature of the spine from vertebral collapse.""

Brittle bones condition

Oops, Tories so affected by bodily weakness!

Bone deficiency

Ostracoderm

Otioseness

Plural or third person singular

""A disease of the ear in which the movement of the stapes within the oval window becomes impeded by abnormal deposits of spongy bone, leading to a progressive loss of hearing.""

Outbreeding

OUTDATED outdate

Leaves behind.

OUTGOING expenditure

Outintrigue

Outmaneuver

Outorganize

Outpopulate

OUTSIDER one who does not belong to a particular group

Outstretch

Ovariotomy

Overachieve

Overanalyse

Overanalysie

Overanalyze

Overarousal

Overarrange

Overbalance

Overbleach

Overcasting

Overcaution

A curious vote, sadly going for the ultra-safe option (wordplay)

COMPRESS to {compact=v}

Overconcern

Overconsume

Overcontrol

Overcorrect

Overdevelop

Overeducate

EMPHASES emphasis

Promises have produced too much stress

Excessive stress

Excessive underlining

Overexplain

Overexploit

Overfatigue

FOCUSSES focus

Overfulfill

Overgarment

Too bountiful

Overharvest

Overhunting

Overindulge

Overinflate

OVERNIGHTER overnight

Overoperate

Overpackage

Overpayment

Overproduce

Overprogram

Overpromise

Overpromote

Overprotect

REACHERS reacher

Overrespond

Overservice

SPENDERS spender

Overstress

Oversupply

Oversweeten

Overtighten

Overutilize

Overvoltage

Owlishness

Oxalacetate

Oxygenation

Ozonosphere