14-letter words containing t, h, i, o
- on the instant — immediately; without delay
- on the viretot — in a rush
- one's eighties — the ages between 80–89
- one's thirties — the ages between 30–39
- one-hit wonder — a singer, composer or group that only ever has one successful piece
- oophorectomies — Plural form of oophorectomy.
- oophorectomize — to surgically remove (one or both ovaries)
- operating cash — the amount of cash or money that a business generates
- ophthalmologic — the branch of medical science dealing with the anatomy, functions, and diseases of the eye.
- opisthobranchs — Plural form of opisthobranch.
- opisthocoelous — relating to vertebrae in which the centrum is convex and the posterior is concave
- opisthoglossal — (of the tongues of amphibians) attached at the front as opposed to the rear
- opisthographic — written on the front and back of a parchment or papyrus
- opthalmologist — Misspelling of ophthalmologist.
- orchestrations — Plural form of orchestration.
- ornithischians — Plural form of ornithischian.
- ornithological — the branch of zoology that deals with birds.
- ornithologists — Plural form of ornithologist.
- ornithomorphic — relating to an ornithomorph
- orthochromatic — representing correctly the relations of colors as found in a subject; isochromatic.
- orthographical — Of, or relating to orthography; spelled correctly.
- orthomyxovirus — Any RNA virus of Orthomyxoviridae family characterised by having two long glycoprotein spikes.
- orthonormalize — (mathematics) To make a set of vectors both orthogonal and normalized.
- orthoselection — orthogenesis (def 1a).
- osteoarthritic — Affected with osteoarthritis.
- osteoarthritis — the most common form of arthritis, usually occurring after middle age, marked by chronic breakdown of cartilage in the joints leading to pain, stiffness, and swelling.
- osteoarthrosis — chronic, noninflammatory arthritis.
- otaheite apple — a Society Islands tree, Spondias cytherea, of the cashew family, having whitish flowers and yellow, edible, plumlike fruit.
- other-directed — guided by a set of values that is derived from current trends or outward influences rather than from within oneself.
- out of fashion — no longer popular
- out the window — discarded or wasted
- outer hebrides — a group of islands (Inner Hebrides and Outer Hebrides) off the W coast of and belonging to Scotland. About 2900 sq. mi. (7500 sq. km).
- outlandishness — The quality of being outlandish.
- outside chance — a slight chance or likelihood
- overenthusiasm — absorbing or controlling possession of the mind by any interest or pursuit; lively interest: He shows marked enthusiasm for his studies.
- overhead light — a light which throws light downwards by being situated on the ceiling or having a downward shade, etc
- overnight stay — in hospital or hotel
- owlet nightjar — any of several birds of the family Aegothelidae, of Australia and Papua New Guinea, related to the nightjars but resembling small owls.
- ownership flat — a flat owned by the occupier
- paint the town — a substance composed of solid coloring matter suspended in a liquid medium and applied as a protective or decorative coating to various surfaces, or to canvas or other materials in producing a work of art.
- palaeanthropic — relating to or denoting the earliest variety of man
- paleoanthropic — pertaining to prehistoric humans.
- parrot-fashion — If you learn or repeat something parrot-fashion, you do it accurately but without really understanding what it means.
- pathologically — of or relating to pathology.
- peritrichously — in a peritrichous manner; in a fashion characteristic of a peritrichous organism
- petrochemicals — substances, such as acetone or ethanol, obtained from petroleum or natural gas
- petrochemistry — the branch of chemistry dealing with petroleum or its products.
- petrophysicist — a person who studies, or is an expert in, petrophysics
- phallocentrism — a doctrine or belief centered on the phallus, especially a belief in the superiority of the male sex.
- phantasmagoria — a shifting series of phantasms, illusions, or deceptive appearances, as in a dream or as created by the imagination.