5 letter words starting with O

Many 5-letter words in English start with the letter ‘O’. Learning these words can help you play word games and crossword puzzles better. Below is a list of some 5-letter ‘O’ words to help you.

Word	Meaning	Sentence
Oasis	A fertile spot in a desert	They found an oasis with a water spring.
Oaths	Solemn promises	The knights took oaths to protect the kingdom.
Obese	Excessively fat	The doctor warned him about becoming obese.
Obey	Comply with the command, direction, or request of	Children should obey their parents.
Obits	Obituaries	He read the obits in the morning paper.
Object	A material thing that can be seen and touched	The strange object turned out to be a sculpture.
Oblige	Make (someone) legally or morally bound to an action or course of action	He was obliged to attend the meeting.
Oboes	Woodwind instruments	The orchestra featured two oboes.
Occur	Happen; take place	The accident occur at the intersection.
Ocean	A very large expanse of sea	They sailed across the vast ocean.
Ocher	An earthy pigment containing ferric oxide	The artist used ocher to give a warm tone.
Ode	A lyric poem, typically one in the form of an address to a particular subject	He wrote a beautiful ode to nature.
Odor	A distinctive smell	The odor of fresh bread filled the bakery.
Offal	The entrails and internal organs of an animal used as food	Offal is considered a delicacy in some cultures.
Offer	Present or proffer for acceptance	He offer her a gift.
Often	Frequently; many times	She visits her family often.
Ogres	Large, hideous mythical monsters	Tales of ogres often scared the children.
Oiled	Treated with oil	He oiled the machinery to keep it running smoothly.
Okapi	An African animal related to the giraffe but with a shorter neck	The okapi is a unique and rare species.
Olden	Relating to the distant past	In olden times, knights roamed the land.
Olive	A small oval fruit	She added olives to the salad.
Omega	The last letter of the Greek alphabet	Omega is often used to signify the end.
Omelet	A dish of beaten eggs cooked in a frying pan	He made an omelet for breakfast.
Onset	The beginning of something	The onset of winter brought snow.
Opals	Gemstones made from hydrated silica	Her necklace was adorned with opals.
Open	Allowing access, passage, or view	The door was left open.
Opera	A dramatic work combining text and music	They attended an opera last night.
Opine	Express an opinion	He was asked to opine on the matter.
Ops	Short for operations	He’s in charge of the ops team.
Opted	Made a choice	She opted for the vegetarian dish.
Optic	Relating to the eye or vision	The surgeon specialized in optic nerves.
Orals	Examinations conducted by word of mouth	The students prepared for their orals.
Orbit	The curved path of a celestial object	The satellite was placed in orbit.
Orcas	Killer whales	Orcas are apex predators in the ocean.
Order	The arrangement or disposition of people or things in relation to each other	He liked his books in order.
Organ	A large musical instrument with pipes	The organ sounded throughout the church.
Orion	A prominent constellation	Orion can be seen clearly in the winter sky.
Orlop	The lowest deck of a ship	Supplies were stored in the orlop.
Orphan	A child whose parents are dead	The orphan was adopted by a loving family.
Osmic	Relating to osmium	Osmic acid is used in certain chemical reactions.
Ossify	Turn into bone or bony tissue	The cartilage will eventually ossify.
Other	Used to refer to a person or thing that is different or distinct from one already mentioned	There must be other solutions to this problem.
Otter	A furry aquatic mammal	The otter played in the river.
Ought	Used to indicate duty or correctness	You ought to apologize for your mistake.
Ounce	A unit of weight	He added an ounce of sugar to the recipe.
Outdo	Surpass in performance	She always tries to outdo her previous achievements.
Outer	On the outside	The outer layer of the wall was damaged.
Outgo	The act of going out; departure	The outgo of the president was unexpected.
Ovals	Shapes resembling an egg in outline	The room had mirrors in ornate ovals.
Ovens	Appliances used for baking or roasting	The ovens were preheated for baking.
Overdo	Do something to an excessive degree	Be careful not to overdo the exercise.
Owing	Due to be paid	The amount owing was considerable.
Owned	Possessed as one’s own	She proudly owned her small business.
Oxbow	A U-shaped bend in the course of a river	The oxbow lake was a popular fishing spot.
Oxide	A binary compound of oxygen with another element	Iron oxide is responsible for rust.