12-Letter Words Starting with O

Oafishness

Oarsmanship

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

Obfuscation

Objectify

Objurgation

""Lanceolate in the reversed order, that is, narrowing toward the point of attachment more than toward the apex.""

Oblateness

OBLIGING oblige

Erasing

Fantastic lob before repeat loss

The removal of oil to Iran - bet it goes astray!

Utter destruction

OBNUBILATE To cloud; to obscure.

Clouding stink over knight with general rejoicing losing head

For this custom, brain's abandoned

One who makes dim, daft subtractions

Wrong subtractions standing in the way of enlightenment

Resisting enlightenment, having messed up subtractions

Obscuration

Roughly Sobers admits VAT is charged for examinations

Measurements from an experiment soon vibrates all over the place

Process of becoming out of date

The state of falling into disuse

Out-of-date quality

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

Childbirth doctor

Medical specialist - is certain to get involved around start of birth (wordplay)

Expert with children, i.e. Scot involved with bairn taking temperature

Hindrances

Noisy disturbances on street after outside broadcast means barriers

Obtuseness

Cosy in a local? Can be, sometimes

From time to time

Party supporter? Now and then

Occidental

Occultation

Relating to one's job or profession

Rehabilitation via practical activities

To do with work

Scientific study of the seas

A subject for deep study

Study of the sea

Oceanology

One whose main interest is scientific

Sea scientist

Scientist involved with study of the seas

Old man's gone out with raincoat

Robert Frost, for example.

Veteran's gone out in shabby raincoat

Odiousness

Odontoblast

Officiation

Offishness

Offscouring

Oleaginous

English word

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

Oligopsony

Omnipotence

With all-encompassing power

Being everywhere at once

Drunk in recompense for divine existence (wordplay)

Ubiquity

Omniscience

Omniscient

Omnivorous

ONCOGENIC

Any of a group of viruses that contain single-stranded RNA and produce tumors in birds and mammals.

English word

Formation of words from natural sounds.

Cuckoo or "whippoorwill," for example

Formation of words like "buzz" or "hiss"

Sounding like its meaning

""Any of numerous velvety-skinned wormlike carnivorous animals common in tropical forests having characteristics of both arthropods and annelid worms; a member of the Onychophora, also called Malacopoda. See Malacopoda.Onychophora, also called Malacopoda. See Malacopoda.""

Opalescence

Opalescent

Opaqueness

Generously display palms

Generously

He'd lend, no pay, all required in most generous fashion

""OPERATION The act or process of operating; agency; the exertion of power, physical, mechanical, or moral.""

""OPERATION The act or process of operating; agency; the exertion of power, physical, mechanical, or moral.""

Unduly attached to one's own opinions; opinionated.

Opportunism

They make the best of what happens to awful sprouts in pot

They make the best of what happens to wild sprouts in pot

The quality or state of being opposite.

""OPPOSITION The act of opposing; an attempt to check, restrain, or defeat; resistance.""

""OPTIMISE to make as effective as possible, also OPTIMIZE""

""OPTIMIZE to make as effective as possible, also OPTIMISE""

Commonly encountered; usual. See Synonyms at common .

Organicity

Firm with The Irish Times, for one

Running over before Saigon train's off

Company talk about fantastic gains

""The act of organizing; the act of arranging in a systematic way for use or action; as, the organization of an army, or of a deliberative body. as, the organization of an army, or of a deliberative body.""

""Making an impression upon an organ; plastic; said of the effect or impression produced by any substance on the organs of touch, taste, or smell, and also on the organism as a whole.""

Organology

Orientalism

Orientalist

ORIENTALIZE to render Oriental; to cause to conform to Oriental manners or conditions.

Orientalize

Orientation

Sport involving maps and compasses

Sport using map and compass

Origination

By way of ornament.

Ornateness

Orneriness

The branch of zoology that deals with the study of birds.

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

Orthodontia

Canine training (wordplay)

Correction of dental irregularities

Branch of dentistry

Professional who may say, "Hold still!"

Professional who may say, 'Hold still!'

... "Get to the chopper!"

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,""

""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,""

""Perpendicularly; at right angles; as, a curve cuts a set of curves orthogonally. as, a curve cuts a set of curves orthogonally.""

Orthopteran

Devious colonialists making waves

Action is so, if developing then hardening

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

Otioseness

OUTACHIEVE

OUTBALANCE To outweight; to exceed in weight or effect.

Outbargain

Outbreeding

Sheds what's not popular in the architects plans

Sheds what's not popular from groundbreaking developments

Outcavil

OUTCOMPETE

Outcropping

OUTDATED outdate

Outdesign

Left (a competitor) far behind

Leaves behind.

Excelled in military skill

OUTGOING expenditure

OUTINTRIGUE

Outintrigue

In a bizarre way

Oddly - and in a foreign manner

Expense includes new food left in an odd way

Outmaneuver

Outnumber

OUTORGANIZE

Outorganize

""The process of facilitating a terminated employee's search for a new job by provision of professional services, such as counseling, paid for by the former employer.""

Outpreach

OUTPRODUCE

OUTPROMISE

Outrebound

Outrival

OUTSIDER one who does not belong to a particular group

Outsourcing

OUTSPARKLE To exceed in sparkling.

Extending broadly

Outsprint

Outstrip

Outthrob

OUTWRESTLE

Way, way, way too prevalent

On a roll, Dutch worker produces too much

Overanalyse

Overanalysie

ANALYZED analyze

Overanalyze

ARRANGED arrange

Overarrange

Fell down

Overbalance

Overbrows

Overbuild

Weighed down, like singer with too many choruses (wordplay)

Overcasting

Overcaution

Electrician's worry?

Electrician's worry (wordplay)

Ripping off

Overchill

Overclaim

Overclean

Overclear

Overcloud

Overcoach

Overconcern

CONSUMED consume

Overconsume

Overcontrol

Overcount

Overcram

Overcrop

Presence of people beyond a comfortable level

Filling beyond what is usual or comfortable

Overdesign

DISCOUNT to reduce the price of

DOCUMENT to support by conclusive information

DOMINANT a controlling genetic character

Clothing too finely

Overdrink

ENAMORED enamor

ENGINEER to arrange or contrive

ENROLLED enrol

Virgin provided with Exocet is bad for blood pressure

Overexert

More than enough effort is a strain

Excess of effort

The use of too much effort

Overexpand

Overexplain

EXPOSING expose

Overextend

Overfavor

Overfocus

Overgarment

Too bountiful

Overgovern

HANDLING the act of handling

Overhunting

IDENTIFY to establish the identity of

Spoilt

Overindulge

Find elevator potentially too big

Overinflate

Overinform

ISSUANCE the act of {issuing=v}

Overlabor

Overlearn

LENGTHEN to make longer

Overlight

MANAGING manage