12-letter words starting with o

on sb's side — If you are on someone's side, you are supporting them in an argument or a war.
on shipboard — on board a ship
on soundings — in waters less than 100 fathoms in depth
on suspicion — as a suspect
on the alert — fully aware and attentive; wide-awake; keen: an alert mind.
on the bench — a long seat for several persons: a bench in the park.
on the blink — to open and close the eye, especially involuntarily; wink rapidly and repeatedly.
on the block — for sale at auction
on the books — registered
on the brain — constantly in mind
on the cadge — engaged in cadging
on the cards — likely
on the cheap — costing very little; relatively low in price; inexpensive: a cheap dress.
on the couch — undergoing psychoanalysis
on the cross — diagonally
on the fence — a barrier enclosing or bordering a field, yard, etc., usually made of posts and wire or wood, used to prevent entrance, to confine, or to mark a boundary.
on the fritz — on the fritz, not in working order: Our TV went on the fritz last night.
on the house — a building in which people live; residence for human beings.
on the latch — fastened by the latch (sense 1) but not locked or bolted
on the level — having no part higher than another; having a flat or even surface.
on the loose — free or released from fastening or attachment: a loose end.
on the march — If a group of soldiers are on the march, they are marching somewhere.
on the money — any circulating medium of exchange, including coins, paper money, and demand deposits.
on the outer — excluded or neglected
on the panel — receiving sickness benefit, esp from the government
on the phone — having a telephone conversation
on the prowl — to rove or go about stealthily, as in search of prey, something to steal, etc.
on the quiet — If something is done on the quiet, it is done secretly or in such a way that people do not notice it.
on the rocks — a large mass of stone forming a hill, cliff, promontory, or the like.
on the ropes — a strong, thick line or cord, commonly one composed of twisted or braided strands of hemp, flax, or the like, or of wire or other material.
on the shelf — a thin slab of wood, metal, etc., fixed horizontally to a wall or in a frame, for supporting objects.
on the skids — a plank, bar, log, or the like, especially one of a pair, on which something heavy may be slid or rolled along.
on the skite — on a drinking spree
on the slate — on credit
on the stick — alert, efficient, etc.
on the stump — If politicians are on the stump, they are campaigning for an election.
on the table — an article of furniture consisting of a flat, slablike top supported on one or more legs or other supports: a kitchen table; an operating table; a pool table.
on the tiles — on a spree, esp of drinking or debauchery
on the wagon — any of various kinds of four-wheeled vehicles designed to be pulled or having its own motor and ranging from a child's toy to a commercial vehicle for the transport of heavy loads, delivery, etc.
on the watch — to be alertly on the lookout, look attentively, or observe, as to see what comes, is done, or happens: to watch while an experiment is performed.
on the whole — comprising the full quantity, amount, extent, number, etc., without diminution or exception; entire, full, or total: He ate the whole pie. They ran the whole distance.
on your bike — away you go
on your feet — position: standing
on your mark — a command given to runners in a race to prepare themselves at the starting line
on your mind — If something is on your mind, you are worried or concerned about it and think about it a lot.
on your side — If something is on your side or if you have it on your side, it helps you when you are trying to achieve something.
on-the-scene — being at the very place of occurrence: an on-the-scene newscast.
once removed — relative: one generation older
oncogenicity — the capability of inducing tumor formation.
oncornavirus — any of various RNA viruses that cause tumors in humans and other animals.

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