9-letter words containing o, t, s
- hecatombs — Plural form of hecatomb.
- hectorism — the character or actions of a hector
- hedonists — Plural form of hedonist.
- heelposts — Plural form of heelpost.
- heliostat — an instrument consisting of a mirror moved by clockwork, for reflecting the sun's rays in a fixed direction.
- heliports — Plural form of heliport.
- helistops — Plural form of helistop.
- hematomas — (US) Plural form of hematoma (Alternative spelling of haematomas).
- hematosis — hematopoiesis.
- hemoblast — hematoblast.
- hemocytes — Plural form of hemocyte.
- hepatomas — Plural form of hepatoma.
- heptagons — Plural form of heptagon.
- herborist — herbalist.
- here's to — in this place; in this spot or locality (opposed to there): Put the pen here.
- herodotus — 484?–425? b.c, Greek historian.
- hesitator — Alternative spelling of hesitater.
- hessonite — essonite.
- heteroses — Plural form of heterosis.
- heterosex — heterosexuality.
- heterosis — the increase in growth, size, fecundity, function, yield, or other characters in hybrids over those of the parents.
- hideosity — horrible or frightful to the senses; repulsive; very ugly: a hideous monster.
- high spot — The high spot of an event or activity is the most exciting or enjoyable part of it.
- high tops — denoting a sneaker that covers the ankle.
- himations — Plural form of himation.
- hip boots — waders: thigh-high rubber boots
- hircosity — the quality of being like a goat
- histogram — a graph of a frequency distribution in which rectangles with bases on the horizontal axis are given widths equal to the class intervals and heights equal to the corresponding frequencies.
- histology — the branch of biology dealing with the study of tissues.
- historian — an expert in history; authority on history.
- historied — abounding in notable history; having an illustrious past; storied: Italy is a richly historied land.
- histories — the branch of knowledge dealing with past events.
- historify — to make something part of history or to tell the history of something
- histotome — a microtome.
- hoarfrost — frost (def 2).
- hoarstone — A stone designating the bounds of an estate; a landmark.
- hobbitses — (humorous, nonstandard) Plural form of hobbit.
- hobbyists — Plural form of hobbyist.
- holdfasts — Plural form of holdfast.
- hollister — a town in W California.
- holliston — a city in NE Massachusetts.
- hollowest — Superlative form of hollow.
- holocaust — a great or complete devastation or destruction, especially by fire.
- holotypes — Plural form of holotype.
- holstered — a sheathlike carrying case for a firearm, attached to a belt, shoulder sling, or saddle.
- holystone — a block of soft sandstone used in scrubbing the decks of a ship.
- homeliest — lacking in physical attractiveness; not beautiful; unattractive: a homely child.
- homesites — Plural form of homesite.
- homestall — Dialect. a farmyard.
- homestand — (baseball) A series of games played at a team's home field.