12-letter words containing o, p, a, c
- anglophobiac — a person with a fear or dread of England or the English
- anisomorphic — differing in the semantic scope of terms referring to the real world: for instance, English and Russian are anisomorphic with regard to colour terms, English treating light blue and navy blue as shades of one colour but Russian treating these two shades as unrelated
- anthocarpous — resembling or pertaining to an anthocarp
- anthrophonic — Relating to anthrophony.
- anthropodicy — An attempt, or argument attempting, to justify the existence of humanity as good (contrast theodicy).
- anticipation — Anticipation is a feeling of excitement about something pleasant or exciting that you know is going to happen.
- anticipatory — An anticipatory feeling or action is one that you have or do because you are expecting something to happen soon.
- antientropic — showing a tendency towards order
- antiperiodic — efficacious against recurring attacks of a disease
- antiphonical — Alternative form of antiphonic.
- antipoaching — acting against or opposed to poaching
- antipolitics — the rejection of party and electoral politics
- antistrophic — Of or pertaining to an antistrophe.
- aortographic — relating to an aortography or aortography
- apagogically — in an apagogical manner
- apalachicola — river in NW Fla., flowing from the Fla.-Ga. border southward into the Gulf of Mexico: 90 mi (145 km)
- aperiodicity — not periodic; irregular.
- aphoristical — Alternative form of aphoristic.
- aphrodisiacs — Plural form of aphrodisiac.
- apicomplexan — Describing protists of the phylum Apicomplexa.
- aplacophoran — solenogaster.
- apocalyptist — the writer of the Apocalypse or a related work
- apochromatic — (of a lens) almost free from spherical and chromatic aberration
- apocryphally — In an apocryphal manner.
- apocynaceous — of, relating to, or belonging to the Apocynaceae, a family of mostly tropical flowering plants with latex in their stems, including the dogbane, periwinkle, oleander, and some lianas
- apodeictical — Apodeictic.
- apolitically — in an apolitical manner
- apostolicity — the quality of being apostolic
- apothecaries — Plural form of apothecary.
- apothegmatic — Relating to, or in the manner of, an apothegm; sententious; pithy.
- appeal court — An appeal court is the same as a Court of Appeal.
- appendectomy — the surgical removal of the vermiform appendix
- apperception — the attainment of full awareness of a sensation or idea
- appleknocker — Northern U.S. a rustic.
- applications — Plural form of application.
- appreciation — Appreciation of something is the recognition and enjoyment of its good qualities.
- appreciators — to be grateful or thankful for: They appreciated his thoughtfulness.
- appreciatory — appreciative.
- approachable — If you describe someone as approachable, you think that they are friendly and easy to talk to.
- approachment — (archaic) approach.
- apricot tart — a pastry case filled with apricots
- arachnophobe — a person who is afraid of spiders
- arch support — a rigid support placed inside a shoe so that its molded form fits the arch of the foot and relieves strain on the muscles of the foot while walking, standing, etc.
- archeopteryx — A specimen of the species Archaeopteryx lithographica, being the earliest and most primitive known bird, representing a transition in the evolution of dinosaurs to birds.
- archesporial — the primitive cell, or group of cells, that give rise to the cells from which spores are derived.
- archesporium — archespore.
- 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
- arctophilist — a collector of teddy bears
- aria da capo — an operatic aria in three sections with the first and third sections alike and the middle section contrasting.