Long words with H

• Hippopotamus

  Real English word with 12 letters - nice and long!

• Helicopter

  Real English word with 10 letters - just fits!

• Hallelujah

  Common English exclamation, 10 letters long.

• Hippocampus

  Real English noun with 11 letters - long enough.

• Horrendous

  Real English word with 10 letters - valid pick.

• Hallucination

  Real English noun, 13 letters - definitely long.

• Hallucinations

  Plural English noun, 14 letters - very long.

• Hysterectomy

  12-letter medical term, valid long H-word.

• Hospitality

  11-letter noun meaning friendliness, valid.

• Hereditary

  10-letter adjective about inheritance, valid.

• Horticulture

  13-letter noun about gardening science, valid.

• Haberdashery

  Shop selling men's clothing or notions; old-timey term.

• Happenstance

  Means chance occurrence; used in storytelling.

• Hypothesis

  Tentative idea to test; key in science.

• Historically

  Adverb about something done in the past.

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• Hermaphrodite

  Organism with both male and female sex organs.

• Hippopotamuses

  Plural of hippopotamus, large African mammal.

• Hypochondriac

  Person overly worried about their health.

• Hepatitis

  Inflammation of the liver; several types exist.

• Hemisphere

  Half of a sphere; also each half of Earth.

• Heliocentric

  Sun-centered model of the solar system.

• Hemoglobin

  Protein in blood carrying oxygen; crucial for life.

• Hilariously

  Adverb meaning in a very funny way.

• Haemoglobin

  British spelling of hemoglobin, same blood protein.

• Hypothetically

  Long 14-letter word, means theoretically or in theory

• Hazardous

  10-letter word meaning dangerous or risky

• Hypothermia

  12-letter word, medical term for low body heat

• Hallucinate

  11-letter verb meaning to see things not real

• homophobic

  11-letter adjective, prejudice against gay people

• hollandaise

  11-letter sauce name from French, used in English

• Humanitarian

  12-letter noun, person devoted to human welfare

• homophobia

  11-letter noun for hatred or fear of gay people

• Helicopters

  11-letter plural for aircraft that use rotating blades

• Hopefully

  10-letter adverb, expressing hope or desire

• Hibernation

  11-letter noun, state of winter sleep in animals

• harmonious

  10-letter adjective, pleasant and musically in tune

• Hypertension

  12-letter medical term for high blood pressure

• Honolulu

  8-letter proper noun city; too short for rules

• Horrendously

  Adverb meaning extremely; 12 letters long

• Heterogeneous

  Adjective for mixed kinds; 13 letters

• Hallucinating

  Present participle of hallucinate; 13 letters

• Hairdresser

  Occupation cutting/styling hair; 11 letters

• Handkerchief

  Tricky spelling cloth for nose; 12 letters

• Horizontal

  Adjective meaning level or parallel; 11 letters

• Holographic

  Adjective about holograms; 11 letters, has H

• Hieroglyphics

  Ancient writing symbols; 13 letters, fits

• Hierarchy

  System of ranking levels; 9+1? Actually 10 letters

• Hullabaloo

  Noisy commotion; fun 11‑letter word with H

• Homogeneous

  Science term for uniform mixture; from Greek roots

• hypothalamus

  Brain region name; regulates many body functions

• Household

  Relates to tasks or goods of a household

• hospitalization

  Medical term for being kept in a hospital

• hopscotch
• Harassment

  Term for persistent unwanted behavior, law usage

• huckleberry

  Berry name; also slangy American surname

• Homeostasis

  Biology term for stable internal conditions

• Hiroshima

  Japanese city name known from WWII history

• Harmoniously

  Adverb meaning in a harmonious manner

• Horticultural

  Adjective relating to gardens and plant growing

• hopelessness

  Noun for extreme lack of hope or optimism

The words in the list Long words with H come from players of the word game Categories game.