9-letter words containing o, n, c, a
- harmonics — Music. overtone (def 1).
- haycation — A vacation stay on a farm, in which guests often help out with daily farm tasks.
- headcanon — (fandom slang) Elements and interpretations of a fictional universe accepted by an individual fan, but not found within or supported by the official canon.
- headcount — The act of counting how many people are present in a group.
- heliconia — any of a genus of tropical flowering plants with long flowering panicles
- hoatching — infested; swarming
- holandric — of or relating to a heritable trait appearing only in males (opposed to hologynic).
- honeycake — A cake made with honey, especially as a Rosh Hashanah tradition.
- hoolachan — a Highland reel
- hopatcong — a town in N New Jersey.
- hornwrack — a yellowish bryozoan or sea mat sometimes found on beaches after a storm
- hurricano — (obsolete) A waterspout; a hurricane.
- hynagogic — Misspelling of hypnagogic.
- hypomanic — Afflicted with a mild state of mania.
- ice apron — a structure built in a river upstream from a bridge pier or the like for protection against drifting ice.
- ignorance — the state or fact of being ignorant; lack of knowledge, learning, information, etc.
- ilocano's — a member of a people of Luzon in the Philippines.
- impaction — an act or instance of impacting.
- in accord — agreeing
- inactions — Plural form of inaction.
- incaution — lack of caution; heedlessness; carelessness.
- incognita — a woman or girl who is incognita.
- incompact — not compact; loose.
- incompass — Archaic form of encompass.
- incourage — Archaic form of encourage.
- incubator — an apparatus in which eggs are hatched artificially.
- indicator — a person or thing that indicates.
- indochina — a peninsula in SE Asia, between the Bay of Bengal and the South China Sea, comprising Vietnam, Cambodia, Laos, Thailand, W Malaysia, and Burma (Myanmar).
- infractor — to break, violate, or infringe (a law, commitment, etc.).
- inoculant — inoculum.
- inoculate — to implant (a disease agent or antigen) in a person, animal, or plant to produce a disease for study or to stimulate disease resistance.
- inorganic — not having the structure or organization characteristic of living bodies.
- insomniac — a person who suffers from insomnia, the inability, especially when chronic, to obtain sufficient sleep, through difficulty in falling or staying asleep: Her husband, an insomniac, had at last fallen asleep at the computer, head resting on the keyboard.
- invocable — to call for with earnest desire; make supplication or pray for: to invoke God's mercy.
- invocated — invoke.
- invocator — invoke.
- ironclads — Plural form of ironclad.
- isoclinal — of or relating to equal direction of inclination; inclining or dipping in the same direction.
- isooctane — the octane C 8 H 18 , used as one of the standards in establishing the octane number of a fuel.
- isopycnal — Also, isopycnal [ahy-suh-pik-nl] /ˌaɪ səˈpɪk nl/ (Show IPA). having the same density.
- jackstone — jack1 (def 5a, b).
- jackwagon — (US, slang, derogatory) An objectionable person; a jerk; a jackass.
- jacobinic — Of or relating to the Jacobins of France; revolutionary.
- jactation — boasting; bragging.
- jane cowl — Jane, 1884–1950, U.S. actress and playwright.
- japonicas — Plural form of japonica.
- jerfalcon — Alternative form of gyrfalcon.
- jonnycake — Alternative spelling of johnnycake.
- jouisance — joy; delight
- kalanchoe — any of several chiefly African and Asian succulent plants or shrubs belonging to the genus Kalanchoe, of the stonecrop family, having mostly opposite leaves and branching clusters of flowers.