English Words: O
15,494 words · Page 130 of 310
The principle of international law where states believe or accept that a practice exists and must be followed because of a rule of law requiring it, to the extent that it becomes part of the body of norms known as international Customary Law.
A belief, judgment or perspective that a person has formed, either through objective or subjective reasoning, about a topic, issue, person or thing.
The right to freely express one's opinion in public, without it being subjected to restrictions.
A form containing a list of statements, each of which the members of a selected group are asked to endorse or reject; the purpose being to gather information for a survey.
Everyone has opinions, and most people's opinions are of exceedingly poor quality.
A polypeptide, found in the pituitary gland, associated with endorphins and other hormones
A gastropod with gills behind the heart, formerly thought to belong to a single group.
Spelling & Dictionary Insight
The English alphabetical index for the letter O contains 15,494 headwords drawn from our Wiktionary-derived dictionary table. At 50 entries per page the browse splits into 310 pages, and you are currently viewing page 130. 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.