12-letter words containing h, a, c, i, o
- antistrophic — Of or pertaining to an antistrophe.
- aortographic — relating to an aortography or aortography
- apalachicola — river in NW Fla., flowing from the Fla.-Ga. border southward into the Gulf of Mexico: 90 mi (145 km)
- aphoristical — Alternative form of aphoristic.
- aphrodisiacs — Plural form of aphrodisiac.
- apochromatic — (of a lens) almost free from spherical and chromatic aberration
- apothecaries — Plural form of apothecary.
- apothegmatic — Relating to, or in the manner of, an apothegm; sententious; pithy.
- archaeologic — Pertaining to archaeology.
- archaic homo — collectively, the very robust, regionally differentiated human populations that lived in Europe, Asia, the Middle East, and Africa from 35,000 to 200,000 years ago.
- archaization — Process of becoming or turning something more archaic.
- archdiocesan — Relating to an archdiocese.
- archdioceses — Plural form of archdiocese.
- archegoniate — having archegonia
- archeologist — archaeology.
- archesporial — the primitive cell, or group of cells, that give rise to the cells from which spores are derived.
- archesporium — archespore.
- archibenthos — the ocean bottom between the littoral and abyssal zones: from depths of approximately 200 feet (60 meters) to 3300 feet (1000 meters).
- archilochian — denoting or relating to the 7th century bc Greek poet Archilochus or his verse, esp the iambic trimeters or trochaic tetrameters used by him
- archipelagos — Plural form of archipelago.
- archiphoneme — an abstract linguistic unit representing two or more phonemes when the distinction between these has been neutralized: conventionally shown by a capital letter within slashes, as /T/ for /t/ and /d/ in German Rat and Rad
- archosaurian — belonging to or characteristic of the archosaurs
- arctophilist — a collector of teddy bears
- aristolochia — any of various plants of the genus Aristolochia of the family Aristolochiaceae
- aristophanic — 448?–385? b.c, Athenian comic dramatist.
- arthropathic — disease of the joints.
- arthroscopic — the use of an arthroscope to diagnose an injury to or disease of a joint or to perform minor surgery on a joint.
- astrochemist — (chemistry, astronomy) A chemist or astronomer whose speciality is astrochemistry.
- astrophysics — Astrophysics is the study of the physical and chemical structure of the stars, planets, and other natural objects in space.
- asynchronies — a lack of synchronism or coincidence in time.
- asynchronism — a lack of synchronism; occurrence at different times
- atheological — having an aversion or resistance to theology
- atheoretical — having no connection with and not founded on theory
- athrocytosis — the capability of a cell to receive and store matter
- atmospherics — Atmospherics are elements in something such as a piece of music or a book which create a certain atmosphere.
- atychiphobia — (rare) The fear of failure.
- autochthonic — pertaining to autochthons; aboriginal; indigenous (opposed to heterochthonous).
- autohypnotic — Of or pertaining to autohypnosis; self-hypnotizing.
- autorhythmic — That generates its own rhythm.
- autorickshaw — (in India) a light three-wheeled vehicle driven by a motorcycle engine
- autotheistic — Self-worshiping; prideful in the extreme.
- axiom schema — (logic) A formula in the language of an axiomatic system, containing one or more. These metasyntactic variables (or "schematic variables") that stand for terms or subformulae. An example is the Axiom of Comprehension.
- azithromycin — A macrolide antibiotic derived from erythromycin.
- bachelorship — the state of being a bachelor; bachelorhood
- bathochromic — denoting or relating to a shift to a longer wavelength in the absorption spectrum of a compound
- beachcombing — The action of a beachcomber.
- beacon light — a light signal for shipping
- bibliothecal — relating to a bibliotheca
- biographical — Biographical facts, notes, or details are concerned with the events in someone's life.
- biomechanics — the study of the mechanics of the movement of living organisms