9-letter words containing a, t, o, n
- hartshorn — the antler of a hart, formerly used as a source of ammonia.
- hatinator — a small decorative hat, worn on social occasions
- have-nots — people who are very poor
- hawthorne — Nathaniel, 1804–64, U.S. novelist and short-story writer.
- hawthorns — Plural form of hawthorn.
- hawthorny — resembling or characterized by hawthorns
- haycation — A vacation stay on a farm, in which guests often help out with daily farm tasks.
- head tone — (in singing) a vocal tone so produced as to bring the cavities of the nose and head into sympathetic vibration.
- headcount — The act of counting how many people are present in a group.
- headnotes — Plural form of headnote.
- headstone — a stone marker set at the head of a grave; gravestone.
- heat-moon — William Least [leest] /list/ (Show IPA), (William Trogden) born 1939, U.S. writer.
- heptagons — Plural form of heptagon.
- heptanone — any of three isomeric ketones, C 11 H 14 O, derived from heptane.
- hexathlon — an athletic contest consisting of six different events
- himations — Plural form of himation.
- historian — an expert in history; authority on history.
- hoarstone — A stone designating the bounds of an estate; a landmark.
- hoatching — infested; swarming
- hog latin — pig Latin.
- homestand — (baseball) A series of games played at a team's home field.
- honey ant — any of several ants, especially of the genus Myrmecocystus, that feed on honeydew or nectar and store the excess juices in the bodies of certain worker ants.
- honeytrap — A stratagem in which irresistible bait is used to lure a victim.
- hopatcong — a town in N New Jersey.
- horntails — Plural form of horntail.
- hortation — The act of exhorting, inciting, or giving advice; exhortation.
- hortensia — Hydrangea.
- hostaging — a person given or held as security for the fulfillment of certain conditions or terms, promises, etc., by another.
- hot pants — (used with a plural verb) very brief and usually tight-fitting shorts for women and girls, first popularized in the early 1970s.
- houstonia — any North American plant, belonging to the genus Houstonia, of the madder family, especially H. caerulea, the common bluet.
- hu jintao — born 1942, Chinese Communist statesman; president of China (2003–2013)
- hydantoin — a colorless, needlelike, crystalline compound, C 3 H 4 N 2 O 2 , used in the synthesis of pharmaceutical substances and resins.
- hydration — any of a class of compounds containing chemically combined water. In the case of some hydrates, as washing soda, Na 2 CO 3 ⋅10H 2 O, the water is loosely held and is easily lost on heating; in others, as sulfuric acid, SO 3 ⋅H 2 O, or H 2 SO 4 , it is strongly held as water of constitution.
- hydrolant — an urgent warning of navigational dangers in the Atlantic Ocean, issued by the U.S. Navy Hydrographic Office.
- hydronaut — a person trained to work in deep-sea vessels for research and rescue purposes.
- hyponasty — increased growth along the lower surface of a plant or plant part, causing it to bend upward.
- hypotonia — An abnormal loss of muscle tone.
- iatrogeny — a disease caused by medical intervention or treatment
- ideations — Plural form of ideation.
- ignorants — Plural form of ignorant.
- illations — Plural form of illation.
- imitation — a result or product of imitating.
- impaction — an act or instance of impacting.
- important — of much or great significance or consequence: an important event in world history.
- in a spot — a rounded mark or stain made by foreign matter, as mud, blood, paint, ink, etc.; a blot or speck.
- inactions — Plural form of inaction.
- inamorata — a woman who loves or is loved; female sweetheart or lover.
- inamorato — a man who loves or is loved; male sweetheart or lover.
- inanition — exhaustion from lack of nourishment; starvation.
- incaution — lack of caution; heedlessness; carelessness.