English Words: O
1,431 words · Page 6 of 29
a polyhedron with eight faces; the regular octahedron has regular triangles as faces and is one of the Platonic solids.
Any of the eighteen isomeric aliphatic hydrocarbons (C₈H₁₈) found in petroleum, especially an iso-octane 2,2,4 trimethyl-pentane; they are used as fuels and solvents.
An interval of twelve semitones spanning eight degrees of the diatonic scale, representing a doubling or halving in pitch frequency.
A sheet of paper 7 to 10 inches (= 17.78 to 25.4 cm) high and 4.5 to 6 inches (= 11.43 to 15.24 cm) wide, the size varying with the large original sheet used to create it. It is made by folding the original sheet three times to produce eight leaves.
Any of several marine molluscs of the order Octopoda, having no internal or external protective shell or bone (unlike the nautilus, squid and cuttlefish) and eight arms each covered with suckers.
A short poetical composition proper to be set to music or sung; a lyric poem; especially, now, a poem characterized by sustained noble sentiment and appropriate dignity of style.
The largest city in the Region of Southern Denmark (Region Syddanmark) and third-largest city in Denmark.
A river in central Europe, that flows from the Czech Republic through Poland and Germany to the Baltic Sea.
A diminutive of the male given names Odell, Odin, Ogilvie, Otis, Odysseus, Odicea, Odoardo, or Odunayo, also used as a formal given name.
A major Germanic god, often described as chief of the pantheon, in his Norse form a member of the Æsir, married to Frigg and associated with knowledge, poetry and war. Wednesday refers to him by way of interpretatio germanica.
An instrument, usually embedded within the speedometer of a vehicle, that measures the distance the vehicle has traveled since production.
Spelling & Dictionary Insight
The English alphabetical index for the letter O contains 1,431 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 29 pages, and you are currently viewing page 6. Every row above is a dictionary-backed entry with a canonical slug, and each links through to a full definition page with pronunciation, senses, etymology, and related-word data where available.
On this page 50 of 50 entries carry a part-of-speech tag and 50 carry at least one stored definition. Coverage varies across letters because Wiktionary volunteers build entries at different speeds for different parts of the alphabet, letters with common starting sounds (S, C, T, P) usually have the densest coverage, while less frequent starters (X, Q, Z) tend to have shorter but more specialised lists. PlainSpell surfaces whatever data is present and links back to the source when a definition is not yet recorded.
For readers using this index as a spelling reference, the guarantee is that every form you see on the list is a documented English headword, not a guess, not a derived inflection lacking a lemma row. If a word you expected to find is absent from the "O" list, it usually means the form exists only as an inflection of another lemma (e.g. a past participle stored under the infinitive) or the entry has not yet been imported from Wiktionary. Use the search bar or the misspelling lookup to resolve these cases.