13-letter words containing o, u, t, s, i
- housing stock — the total number of houses, flats, etc, in an area
- hudson strait — a strait connecting Hudson Bay and the Atlantic. 450 miles (725 km) long; 100 miles (160 km) wide.
- hunting sword — a short, light saber of the 18th century, having a straight or slightly curved blade.
- hydrosulphite — hyposulfite (def 1).
- hypercautious — Especially or unreasonably cautious.
- hyposexuality — A significantly low level of sexuality.
- i told you so — If someone disagrees with you or refuses to do what you suggest and you are eventually proved to be right, you can say 'I told you so'.
- ichthyosaurus — ichthyosaur.
- illuminations — Plural form of illumination.
- illusionistic — a technique of using pictorial methods in order to deceive the eye. Compare trompe l'oeil.
- illustrations — Plural form of illustration.
- illustriously — highly distinguished; renowned; famous: an illustrious leader.
- illustrissimo — most illustrious (esp as belonging to the Italian aristocracy)
- immunisations — Plural form of immunisation.
- immunizations — Plural form of immunization.
- immunochemist — A chemist whose speciality is immunochemistry.
- immunosorbent — an insoluble surface to which a specific antibody is attached for the purpose of removing the corresponding antigen from a solution or suspension.
- impecuniosity — having little or no money; penniless; poor.
- impetuosities — Plural form of impetuosity.
- impetuousness — of, relating to, or characterized by sudden or rash action, emotion, etc.; impulsive: an impetuous decision; an impetuous person.
- importunities — Plural form of importunity.
- impostumation — an abscess or swelling filled with pus
- in silhouette — If you see something in silhouette, you see it as a dark shape with no detail except for the outline.
- in the clouds — a visible collection of particles of water or ice suspended in the air, usually at an elevation above the earth's surface.
- inaugurations — Plural form of inauguration.
- incombustible — not combustible; incapable of being burned; fireproof.
- incongruities — the quality or condition of being incongruous.
- inconsecutive — not consecutive.
- inconstruable — unable to be construed
- incorruptness — The state of being incorrupt.
- industriously — working energetically and devotedly; hard-working; diligent: an industrious person.
- infostructure — The technical infrastructure supporting an information system.
- infructuously — in an infructuous or unfruitful manner; fruitlessly
- inns of court — (in England) the four private unincorporated societies in London that function as a law school and have the exclusive privilege of calling candidates to the English bar
- inobtrusively — in an unobtrusive manner
- inquisitional — Of or pertaining to an inquisition.
- inquisitioned — Simple past tense and past participle of inquisition.
- inquisitorial — of or relating to an inquisitor or inquisition.
- insectivorous — adapted to feeding on insects.
- instantaneous — occurring, done, or completed in an instant: an instantaneous response.
- institutional — of, relating to, or established by institution.
- instructional — the act or practice of instructing or teaching; education.
- insubordinate — not submitting to authority; disobedient: an insubordinate soldier.
- insupportable — not endurable; unbearable; insufferable: insupportable pain.
- insupportably — In an insupportable manner.
- insurrections — Plural form of insurrection.
- insusurration — (obsolete) The act of whispering into something.
- interlocutors — a person who takes part in a conversation or dialogue.
- interosculant — Mutually touching or intersecting.
- interosculate — to interpenetrate; inosculate.