| Meaning | Explication | As a source | As a target | Taxon | ||
|---|---|---|---|---|---|---|
| <office> | 1 | Artifacts | Show all shifts | Show map | ||
| <orthopteran> | 2 | 2 | Animals | Show all shifts | Show map | |
| oak | deciduous tree with distinctive deeply lobed leaves, acorns, and notably strong wood, typically of England and northeastern North America, included in genus Quercus. | 4 | 6 | Plants | Show all shifts | Show map |
| oar | type of lever used to propel a boat, having a flat blade at one end and a handle at the other, and pivoted in a rowlock atop the gunwale, whereby a rower seated in the boat and pulling the handle can pass the blade through the water by repeated strokes against the water's resistance, thus moving the boat | 2 | 5 | Artifacts | Show all shifts | Show map |
| oat | widely cultivated cereal grass, typically Avena sativa | 3 | 2 | Plants | Show all shifts | Show map |
| oath | 1 | N/a | Show all shifts | Show map | ||
| obedient | willing to comply with the commands, orders, or instructions of those in authority | 1 | N/a | Show all shifts | Show map | |
| object | None | 1 | Artifacts | Show all shifts | Show map | |
| objection, contradiction | 1 | N/a | Show all shifts | Show map | ||
| obscene | having indecent sexual desire | 1 | N/a | Show all shifts | Show map | |
| observer | 1 | Human being | Show all shifts | Show map | ||
| obsidian | naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth | 1 | N/a | Show all shifts | Show map | |
| obstacle | something that impedes progress or achievement (Merriam-Webster) | 4 | N/a | Show all shifts | Show map | |
| obstinate, persistent | None | 1 | 7 | Non-physical | Show all shifts | Show map |
| ocean | one of the large bodies of water separating the continents | 2 | N/a | Show all shifts | Show map | |
| ocean sunfish (Mola mola) | large, heavy species of bony fish, Mola mola, native to tropical and temperate waters around the world | 8 | N/a | Show all shifts | Show map | |
| ochre | 1 | N/a | Show all shifts | Show map | ||
| October | tenth month of the Gregorian calendar, following September and preceding November | 22 | N/a | Show all shifts | Show map | |
| odd (of numbers) | not divisible by two without leaving a remainder | 1 | 1 | N/a | Show all shifts | Show map |
| oesophagus | tube that carries food from the pharynx to the stomach | 1 | N/a | Show all shifts | Show map | |
| of high rank | 2 | Non-physical | Show all shifts | Show map | ||
| of low rank | None | 1 | Non-physical | Show all shifts | Show map | |
| official (n.) | 1 | N/a | Show all shifts | Show map | ||
| offspring | 1 | 2 | N/a | Show all shifts | Show map | |
| often | 1 | N/a | Show all shifts | Show map | ||
| oil (food) | 11 | 1 | Artifacts | Show all shifts | Show map | |
| oil particle | 1 | Natural objects | Show all shifts | Show map | ||
| ointment | (medicine) A viscous preparation of oils and/or fats, usually containing medication, used as a treatment or as an emollient | 1 | N/a | Show all shifts | Show map | |
| OK | expression used to indicate acceptance | 2 | Abstract relations | Show all shifts | Show map | |
| old (vs. new) | existing, created a long time ago | 3 | 3 | Time | Show all shifts | Show map |
| old (vs. young) | having lived for most of the expected years | 8 | 3 | Time | Show all shifts | Show map |
| old man | 12 | 3 | Human being | Show all shifts | Show map | |
| old man/grandfather | old man and grandfather | 1 | N/a | Show all shifts | Show map | |
| old woman | 3 | 2 | Human being | Show all shifts | Show map | |
| oleander | 1 | N/a | Show all shifts | Show map | ||
| olive (Olea europaea) | 2 | N/a | Show all shifts | Show map | ||
| omen | 1 | 2 | Abstract entities | Show all shifts | Show map | |
| on all fours | on one's hands and knees | 1 | N/a | Show all shifts | Show map | |
| on the outside | 1 | 2 | Space | Show all shifts | Show map | |
| once | 1 | N/a | Show all shifts | Show map | ||
| one hundred thousand | 1 | N/a | Show all shifts | Show map | ||
| one piece (at counting) | 2 | Abstract entities | Show all shifts | Show map | ||
| one's own | 2 | N/a | Show all shifts | Show map | ||
| one, single | None | 6 | Abstract entities | Show all shifts | Show map | |
| onion | 3 | 2 | N/a | Show all shifts | Show map | |
| only | None | 1 | 6 | Abstract entities | Show all shifts | Show map |
| open (adj.) | 3 | 1 | Other physical | Show all shifts | Show map | |
| open-eyed | with open eyes | 1 | N/a | Show all shifts | Show map | |
| opening of a sack | 1 | N/a | Show all shifts | Show map | ||
| opening, hole | 10 | 5 | Natural objects | Show all shifts | Show map | |
| operculum of a snail | anatomical structure like a trapdoor that exists in many (but not all) groups of sea snails and freshwater snails, and also in a few groups of land snails | 1 | N/a | Show all shifts | Show map | |
| opinion | 1 | 1 | Abstract entities | Show all shifts | Show map | |
| opossum | 1 | 1 | Animals | Show all shifts | Show map | |
| opportunity | 5 | Abstract entities | Show all shifts | Show map | ||
| opposite | 3 | 2 | Non-physical | Show all shifts | Show map | |
| orange (color) | colour of a ripe fruit of an orange tree, midway between red and yellow | 1 | N/a | Show all shifts | Show map | |
| orange (plant) | 1 | N/a | Show all shifts | Show map | ||
| orator | 1 | N/a | Show all shifts | Show map | ||
| order | 1 | N/a | Show all shifts | Show map | ||
| ordinary | 1 | 1 | N/a | Show all shifts | Show map | |
| oregano | 3 | N/a | Show all shifts | Show map | ||
| organ (anatomy) | larger part of an organism, composed of tissues that perform similar functions | 1 | N/a | Show all shifts | Show map | |
| origin | None | 4 | Abstract entities | Show all shifts | Show map | |
| original (of a document) | None | 1 | N/a | Show all shifts | Show map | |
| Orion's Belt | bright asterism located near the celestial equator, consisting of three bright stars lined up and visibly close together | 1 | Other physical | Show all shifts | Show map | |
| orphan | 7 | 1 | N/a | Show all shifts | Show map | |
| osprey (Pandion haliaёtus) | 7 | N/a | Show all shifts | Show map | ||
| ostrich | 2 | Animals | Show all shifts | Show map | ||
| other | 8 | 1 | Non-physical | Show all shifts | Show map | |
| other`s | 2 | Non-physical | Show all shifts | Show map | ||
| otter (Lutra lutra) | 4 | 7 | Animals | Show all shifts | Show map | |
| outbuilding | 1 | N/a | Show all shifts | Show map | ||
| outwards | N/a | Show all shifts | Show map | |||
| oven | 1 | N/a | Show all shifts | Show map | ||
| overcoat | 2 | Artifacts | Show all shifts | Show map | ||
| owl | 4 | 1 | Animals | Show all shifts | Show map | |
| own (of a relative) | 2 | Non-physical | Show all shifts | Show map | ||
| owner | 10 | 3 | Human being | Show all shifts | Show map | |
| owner (female) | 3 | N/a | Show all shifts | Show map | ||
| owre, buffalo (Bubalus bubalis) | 1 | Animals | Show all shifts | Show map | ||
| ox | N/a | Show all shifts | Show map |