5-Letter Nouns Starting With O
Here's the list of all the 192 5-Letter Nouns Starting With O in the English Language.
The list is arranged by the word lengths. Click on the length below to jump to the relevant section of the page.
| Common Nouns (with Definitions and Examples) | |
|---|---|
| other | More Definitions → |
| order | 1. (often plural) a command given by a superior (e.g., a military or law enforcement officer) that must be obeyed 2. a degree in a continuum of size or quantity More Definitions → |
| offer | 1. the verbal act of offering 2. something offered (as a proposal or bid) More Definitions → |
| owner | 1. (law) someone who owns (is legal possessor of) a business 2. a person who owns something More Definitions → |
| ocean | 1. a large body of water constituting a principal part of the hydrosphere 2. anything apparently limitless in quantity or volume More Definitions → |
| opera | 1. a drama set to music; consists of singing with orchestral accompaniment and an orchestral overture and interludes 2. a building where musical dramas are performed More Definitions → |
| outer | More Definitions → |
| omega | 1. the ending of a series or sequence 2. the last (24th) letter of the Greek alphabet More Definitions → |
| olive | 1. small ovoid fruit of the European olive tree; important food and source of oil 2. evergreen tree cultivated in the Mediterranean region since antiquity and now elsewhere; has edible shiny black fruits More Definitions → |
| oasis | 1. a fertile tract in a desert (where the water table approaches the surface) 2. a shelter serving as a place of safety or sanctuary More Definitions → |
| organ | 1. a fully differentiated structural and functional unit in an animal that is specialized for some particular function 2. a government agency or instrument devoted to the performance of some specific function More Definitions → |
| onion | 1. the bulb of an onion plant 2. bulbous plant having hollow leaves cultivated worldwide for its rounded edible bulb More Definitions → |
| ozone | 1. a colorless gas (O3) soluble in alkalis and cold water; a strong oxidizing agent; can be produced by electric discharge in oxygen or by the action of ultraviolet radiation on oxygen in the stratosphere (where it acts as a screen for ultraviolet radiation) More Definitions → |
| orbit | 1. the (usually elliptical) path described by one celestial body in its revolution about another 2. a particular environment or walk of life More Definitions → |
| oxide | 1. any compound of oxygen with another element or a radical More Definitions → |
| optic | 1. the organ of sight More Definitions → |
| onset | 1. the beginning or early stages 2. (military) an offensive against an enemy (using weapons) More Definitions → |
| ounce | 1. a unit of apothecary weight equal to 480 grains or one twelfth of a troy pound 2. a unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams More Definitions → |
| octet | 1. the cardinal number that is the sum of seven and one 2. eight performers or singers who perform together More Definitions → |
| otter | 1. the fur of an otter 2. freshwater carnivorous mammal having webbed and clawed feet and dark brown fur More Definitions → |
| opium | 1. an addictive narcotic extracted from seed capsules of the opium poppy More Definitions → |
| ovary | 1. the organ that bears the ovules of a flower 2. (vertebrates) one of usually two organs that produce ova and secrete estrogen and progesterone More Definitions → |
| odour | 1. the sensation that results when olfactory receptors in the nose are stimulated by particular chemicals in gaseous form 2. any property detected by the olfactory system More Definitions → |
| octal | More Definitions → |
| ochre | 1. any of various earths containing silica and alumina and ferric oxide; used as a pigment 2. a moderate yellow-orange to orange color More Definitions → |
| orang | 1. large long-armed ape of Borneo and Sumatra having arboreal habits More Definitions → |
| oxbow | 1. the land inside an oxbow bend in a river 2. a U-shaped curve in a stream More Definitions → |
| oriel | 1. a projecting bay window corbeled or cantilevered out from a wall More Definitions → |
| oldie | 1. a song that was formerly popular More Definitions → |
| offal | 1. viscera and trimmings of a butchered animal often considered inedible by humans More Definitions → |
| oomph | 1. attractiveness to the opposite sex 2. the activeness of an energetic personality More Definitions → |
| ology | 1. an informal word (abstracted from words with this ending) for some unidentified branch of knowledge More Definitions → |
| oiler | 1. a worker who oils engines or machinery 2. a well that yields or has yielded oil More Definitions → |
| ovine | More Definitions → |
| ovoid | 1. an egg-shaped object More Definitions → |