13-letter words containing a, s, t, o, n, i
- occasionality — the condition or character of being infrequent or intended for a specific occasion, or that which is infrequent or intended for a specific occasion
- occidentalism — Occidental character or characteristics.
- oceanic crust — the brown, hard outer portion or surface of a loaf or slice of bread (distinguished from crumb).
- octogenarians — Plural form of octogenarian.
- odontoblastic — Relating to odontoblasts.
- on the parish — receiving parochial relief
- onanistically — In an onanistic manner.
- onomastically — In an onomastic way.
- onomatologist — One versed in the history of names.
- onomatopoeias — Plural form of onomatopoeia.
- onychophagist — the practice of biting one's nails, especially when done habitually and as a symptom of emotional disturbance.
- operativeness — (uncountable) The state or quality of being operative.
- opisthobranch — any gastropod mollusk of the order Opisthobranchia, as the sea slugs, sea butterflies, and sea hares, characterized by a vestigial or absent mantle and shell and two pairs of tentacles.
- oppositionary — the action of opposing, resisting, or combating.
- optical sound — sound recorded on and subsequently played back from an optical or photographic soundtrack, as opposed to a magnetic soundtrack.
- optimizations — Plural form of optimization.
- oral solution — An oral solution is a medicine in liquid form for drinking.
- orchestrating — Present participle of orchestrate.
- orchestration — (uncountable) the arrangement of music for performance by an orchestra.
- organ whistle — a steam or air whistle in which the jet is forced up against the thin edge of a pipe closed at the top.
- organisations — Plural form of organisation.
- organizations — The action of organizing something.
- organotropism — Physiology. the attraction of microorganisms or chemical substances to particular organs or tissues of the body.
- originalities — Plural form of originality.
- ornamentalism — the desire or tendency to feature ornament in the design of buildings, interiors, furnishings, etc.
- ornamentalist — A person who ornaments.
- ornithischian — any herbivorous dinosaur of the order Ornithischia, having a pelvis resembling that of a bird. Compare saurischian.
- orthogonalise — to make (vectors, functions, etc.) orthogonal.
- osa extension — (OSAX) Any extension to Macintosh OSA.
- oscillational — characterized by oscillation
- ossifications — Plural form of ossification.
- ostracisation — Alternative form of ostracization.
- ostracization — to exclude, by general consent, from society, friendship, conversation, privileges, etc.: His friends ostracized him after his father's arrest.
- outdistancing — Present participle of outdistance.
- outstandingly — prominent; conspicuous; striking: an outstanding example of courage.
- outwash plain — Geology. a broad, sloping landform built of coalesced deposits of outwash.
- over-standing — overreach (def 13).
- overassertion — assertion of something to an excessive or unnecessary degree
- overhastiness — the condition of being overhasty
- ovipositional — pertaining to the laying of eggs through an ovipositor
- painted horse — paint (def 6).
- pan-teutonism — Pan-Germanism.
- pantheologist — a student of, or expert in, pantheology
- pantisocratic — relating to pantisocracy
- parthian shot — a sharp, telling remark, act, gesture, etc., made in departing.
- passion fruit — any edible fruit of a passionflower, as the maypop.
- past anterior — a pluperfect verb (in French)
- pentastichous — (of plant leaves) arranged in five vertical rows
- pentatonicism — the use of a five-tone scale.
- perlustration — the act of perlustrating; a thorough inspection or survey, esp of letters for purposes of surveillance