3-letter words that end in o
- nco — An NCO is a soldier who has a fairly low rank such as sergeant or corporal. NCO is an abbreviation for 'non-commissioned officer'.
- neo — new, new-style
- ngo — 1901–1963, South Vietnamese statesman: president of the Republic of South Vietnam 1956–63.
- noo — (Geordie) now.
- nto — National Training Organization
- o-o — any of several species of Hawaiian honey eaters of the genus Moho, especially the extinct M. nobilis, of the island of Hawaii, that had black plumage and two tufts of yellow plumes used to make ceremonial robes for the Hawaiian kings.
- obo — Or best offer (used in advertisements).
- ogo — Ogonori.
- oho — Used to express pleased surprise or recognition.
- ono — Or nearest offer.
- ooo — OpenOffice.org
- oro — gold.
- oto — a member of a Siouan-speaking tribe of North American Indians who formerly inhabited the lower Missouri River basin and now live in Oklahoma.
- ovo — from the beginning.
- oxo — extract of beef in the shape of small cubes which are mixed with boiling water and used for flavouring, as stock, a drink, etc
- oyo — a city in W Nigeria.
- pdo — Protected Denomination of Origin: a geographical indication defined within European Union law in order to protect regional agricultural products and foodstuffs
- pho — a N Vietnamese soup made of beef or chicken stock with rice noodles and thin slices of beef or chicken.
- plo — Palestine Liberation Organization
- poo — excrement.
- ppo — A PPO is an organization whose members receive medical care at a greatly reduced cost only if they use doctors and hospitals which belong to the organization.
- pro — in favor of a proposition, opinion, etc.
- pso — Oracle Parallel Server
- pto — please turn over: the page
- qso — quasi-stellar object
- qto — Quarto.
- quo — quoth.
- rco — Royal College of Organists
- reo — a language
- rho — the 17th letter of the Greek alphabet (P, ρ).
- rio — a seaport in SE Brazil: former capital.
- roo — kangaroo.
- s/o — standing order
- sco — Santa Cruz Operation
- seo — search engine optimization
- sfo — Serious Fraud Office: the department of the British government which investigates cases of serious financial fraud
- slo — Slovenia (international car registration)
- soo — the, Canadian. Sault Ste. Marie.
- sro — standing room only
- sso — single sign-on
- suo — in one's own or rightful place.
- tao — (in philosophical Taoism) that in virtue of which all things happen or exist.
- tco — total cost of ownership: the real cost of owning and using a piece of equipment such as a computer, taking into account the price of the hardware, software, maintenance, training, and technical support that may be needed
- tko — technical knockout
- tmo — (in rugby) television match official
- too — in addition; also; furthermore; moreover: young, clever, and rich too.
- tpo — twisted pair only
- tro — tail recursion optimisation
- tso — Time Sharing Option
- two — a cardinal number, 1 plus 1.