| haustorium | (noun) a root-like attachment in parasitic plants that penetrates and obtains food from the host | - |
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| heaume | (noun) a large medieval helmet supported on the shoulders | - |
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| helianthemum | (noun) any plant of the genus Helianthemum; vigorous plants of stony alpine meadows and dry scrub regions | Synonyms: sun rose, sunrose |
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| helium | (noun) a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas) | Synonyms: atomic number 2, He |
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| herbarium | (noun) a collection of dried plants that are mounted and systematically classified for study | - |
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| hilum | (noun) (anatomy) a depression or fissure where vessels or nerves or ducts enter a bodily organ | Synonyms: hilus |
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| (noun) the scar on certain seeds marking its point of attachment to the funicle | - |
| hippeastrum | (noun) amaryllis of tropical America often cultivated as a houseplant for its showy white to red flowers | Synonyms: Hippeastrum puniceum |
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| hokum | (noun) a message that seems to convey no meaning | Synonyms: bunk, meaninglessness, nonsense, nonsensicality |
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| holmium | (noun) a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds | Synonyms: atomic number 67, Ho |
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| honorarium | (noun) a fee paid for a nominally free service | - |
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| hoodlum | (noun) an aggressive and violent young criminal | Synonyms: goon, hood, punk, strong-armer, thug, tough, toughie |
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| hordeolum | (noun) an infection of the sebaceous gland of the eyelid | Synonyms: eye infection, sty, stye |
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| hoummos | (noun) a thick spread made from mashed chickpeas, tahini, lemon juice and garlic; used especially as a dip for pita; originated in the Middle East | Synonyms: hommos, hummus, humous, humus |
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| hum | (noun) a humming noise | Synonyms: humming |
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| (noun) the state of being or appearing to be actively engaged in an activity | Synonyms: busyness |
| human | (noun) any living or extinct member of the family Hominidae characterized by superior intelligence, articulate speech, and erect carriage | Synonyms: homo, human being, man |
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| humaneness | (noun) the quality of compassion or consideration for others (people or animals) | - |
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| humanisation | (noun) the act of making more human | Synonyms: humanization |
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| humanism | (noun) the doctrine emphasizing a person's capacity for self-realization through reason; rejects religion and the supernatural | Synonyms: secular humanism |
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| (noun) the doctrine that people's duty is to promote human welfare | Synonyms: humanitarianism |
| (noun) the cultural movement of the Renaissance; based on classical studies | - |
| humanist | (noun) a classical scholar or student of the liberal arts | - |
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| (noun) an advocate of the principles of humanism; someone concerned with the interests and welfare of humans | Synonyms: humanitarian |
| humanitarian | (noun) someone devoted to the promotion of human welfare and to social reforms | Synonyms: do-gooder, improver |
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| (noun) an advocate of the principles of humanism; someone concerned with the interests and welfare of humans | Synonyms: humanist |
| humanitarianism | (noun) the doctrine that people's duty is to promote human welfare | Synonyms: humanism |
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| humanities | (noun) studies intended to provide general knowledge and intellectual skills (rather than occupational or professional skills) | Synonyms: arts, humanistic discipline, liberal arts |
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| humanity | (noun) all of the living human inhabitants of the earth | Synonyms: human beings, human race, humankind, humans, man, mankind, world |
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| (noun) the quality of being humane | - |
| (noun) the quality of being human | Synonyms: humanness, manhood |
| humanization | (noun) the act of making more human | Synonyms: humanisation |
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| humankind | (noun) all of the living human inhabitants of the earth | Synonyms: human beings, human race, humanity, humans, man, mankind, world |
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| humanness | (noun) the quality of being human | Synonyms: humanity, manhood |
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| humanoid | (noun) an automaton that resembles a human being | Synonyms: android, mechanical man |
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| humans | (noun) all of the living human inhabitants of the earth | Synonyms: human beings, human race, humanity, humankind, man, mankind, world |
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| humate | (noun) material that is high in humic acids | - |
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| humblebee | (noun) robust hairy social bee of temperate regions | Synonyms: bumblebee |
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| humbleness | (noun) a disposition to be humble; a lack of false pride | Synonyms: humility |
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| (noun) a humble feeling | Synonyms: humility |
| (noun) the state of being humble and unimportant | Synonyms: lowliness, obscureness, unimportance |
| humbug | (noun) something intended to deceive; deliberate trickery intended to gain an advantage | Synonyms: dupery, fraud, fraudulence, hoax, put-on |
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| (noun) pretentious or silly talk or writing | Synonyms: baloney, bilgewater, boloney, bosh, drool, taradiddle, tarradiddle, tommyrot, tosh, twaddle |
| (noun) communication (written or spoken) intended to deceive | Synonyms: snake oil |
| humdinger | (noun) someone of remarkable excellence | - |
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| humdrum | (noun) the quality of wearisome constancy, routine, and lack of variety | Synonyms: monotony, sameness |
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| humectant | (noun) any substance that is added to another substance to keep it moist | - |
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| humerus | (noun) bone extending from the shoulder to the elbow | - |
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| humidifier | (noun) an appliance designed to add moisture to the air in a building | - |
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| humidity | (noun) wetness in the atmosphere | Synonyms: humidness |
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| humidness | (noun) wetness in the atmosphere | Synonyms: humidity |
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| humification | (noun) the process of the formation of humus from plant remains | - |
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| humiliation | (noun) depriving one of self-esteem | Synonyms: abasement |
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| (noun) an instance in which you are caused to lose your prestige or self-respect | Synonyms: mortification |
| (noun) strong feelings of embarrassment | Synonyms: chagrin, mortification |
| (noun) state of disgrace or loss of self-respect | - |
| humility | (noun) a disposition to be humble; a lack of false pride | Synonyms: humbleness |
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| (noun) a humble feeling | Synonyms: humbleness |
| humin | (noun) a black humic substance that is not soluble in water | - |
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| hummer | (noun) (baseball) a pitch thrown with maximum velocity | Synonyms: bullet, fastball, heater, smoke |
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| (noun) a singer who produces a tune without opening the lips or forming words | - |
| humming | (noun) the act of singing with closed lips | - |
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| (noun) a humming noise | Synonyms: hum |
| hummingbird | (noun) tiny American bird having brilliant iridescent plumage and long slender bills; wings are specialized for vibrating flight | - |
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| hummock | (noun) a small natural hill | Synonyms: hammock, hillock, knoll, mound |
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| hummus | (noun) a thick spread made from mashed chickpeas, tahini, lemon juice and garlic; used especially as a dip for pita; originated in the Middle East | Synonyms: hommos, hoummos, humous, humus |
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| humor | (noun) the quality of being funny | Synonyms: humour |
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| (noun) the trait of appreciating (and being able to express) the humorous | Synonyms: humour, sense of humor, sense of humour |
| (noun) the liquid parts of the body | Synonyms: bodily fluid, body fluid, humour, liquid body substance |
| (noun) (Middle Ages) one of the four fluids in the body whose balance was believed to determine your emotional and physical state | Synonyms: humour |
| (noun) a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter | Synonyms: humour, wit, witticism, wittiness |
| (noun) a characteristic (habitual or relatively temporary) state of feeling | Synonyms: humour, mood, temper |
| humoring | (noun) the act of indulging or gratifying a desire | Synonyms: humouring, indulgence, indulging, pampering |
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| humorist | (noun) someone who acts, speaks or writes in an amusing way | Synonyms: humourist |
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| humorousness | (noun) the trait of merry joking | Synonyms: jocoseness, jocosity, merriness |
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| humour | (noun) the quality of being funny | Synonyms: humor |
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| (noun) the trait of appreciating (and being able to express) the humorous | Synonyms: humor, sense of humor, sense of humour |
| (noun) the liquid parts of the body | Synonyms: bodily fluid, body fluid, humor, liquid body substance |
| (noun) (Middle Ages) one of the four fluids in the body whose balance was believed to determine your emotional and physical state | Synonyms: humor |
| (noun) a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter | Synonyms: humor, wit, witticism, wittiness |
| (noun) a characteristic (habitual or relatively temporary) state of feeling | Synonyms: humor, mood, temper |
| humouring | (noun) the act of indulging or gratifying a desire | Synonyms: humoring, indulgence, indulging, pampering |
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| humourist | (noun) someone who acts, speaks or writes in an amusing way | Synonyms: humorist |
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| humous | (noun) a thick spread made from mashed chickpeas, tahini, lemon juice and garlic; used especially as a dip for pita; originated in the Middle East | Synonyms: hommos, hoummos, hummus, humus |
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| hump | (noun) something that bulges out or is protuberant or projects from its surroundings | Synonyms: bulge, bump, excrescence, extrusion, gibbosity, gibbousness, jut, prominence, protrusion, protuberance, swelling |
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| humpback | (noun) large whalebone whale with long flippers noted for arching or humping its back as it dives | Synonyms: humpback whale, Megaptera novaeangliae |
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| (noun) a person whose back is hunched because of abnormal curvature of the upper spine | Synonyms: crookback, hunchback |
| (noun) an abnormal backward curve to the vertebral column | Synonyms: hunchback, kyphosis |
| humus | (noun) a thick spread made from mashed chickpeas, tahini, lemon juice and garlic; used especially as a dip for pita; originated in the Middle East | Synonyms: hommos, hoummos, hummus, humous |
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| (noun) partially decomposed organic matter; the organic component of soil | - |
| hydrargyrum | (noun) a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures | Synonyms: atomic number 80, Hg, mercury, quicksilver |
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| hydroflumethiazide | (noun) diuretic used to treat hypertension and edema | - |
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| hymenium | (noun) spore-bearing layer of cells in certain fungi containing asci or basidia | - |
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| hypanthium | (noun) the cuplike or ringlike or tubular structure of a flower which bears the sepals and stamens and calyx (as in Rosaceae) | Synonyms: calyx tube, floral cup |
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| hypobasidium | (noun) special cell constituting the base of the basidium in various fungi especially of the order Tremellales | - |
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| hypochondrium | (noun) the upper region of the abdomen just below the lowest ribs on either side of the epigastrium | - |
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| ichneumon | (noun) northern African mongoose; in ancient times thought to devour crocodile eggs | Synonyms: Herpestes ichneumon |
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| ileum | (noun) the part of the small intestine between the jejunum and the cecum | - |
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| ilium | (noun) the upper and widest of the three bones making up the hipbone | - |
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| illuminance | (noun) the luminous flux incident on a unit area | Synonyms: illumination |
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| illuminant | (noun) something that can serve as a source of light | - |
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| illumination | (noun) painting or drawing included in a book (especially in illuminated medieval manuscripts) | Synonyms: miniature |
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| (noun) the luminous flux incident on a unit area | Synonyms: illuminance |
| (noun) an interpretation that removes obstacles to understanding | Synonyms: clarification, elucidation |
| (noun) the degree of visibility of your environment | - |
| (noun) a condition of spiritual awareness; divine illumination | Synonyms: light |
| imaum | (noun) (Islam) the man who leads prayers in a mosque; for Shiites an imam is a recognized authority on Islamic theology and law and a spiritual guide | Synonyms: imam |
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| imperium | (noun) supreme authority; absolute dominion | - |
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| (noun) the domain ruled by an emperor or empress; the region over which imperial dominion is exercised | Synonyms: empire |
| incumbency | (noun) the office of an incumbent | - |
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| (noun) a duty that is incumbent upon you | - |
| (noun) the term during which some position is held | Synonyms: tenure, term of office |
| incumbent | (noun) the official who holds an office | Synonyms: officeholder |
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| incumbrance | (noun) any obstruction that impedes or is burdensome | Synonyms: encumbrance, hinderance, hindrance, hitch, interference, preventative, preventive |
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| (noun) an onerous or difficult concern | Synonyms: burden, encumbrance, load, onus |
| (noun) a charge against property (as a lien or mortgage) | Synonyms: encumbrance |
| indecorum | (noun) an act of undue intimacy | Synonyms: familiarity, impropriety, liberty |
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| (noun) a lack of decorum | Synonyms: indecorousness |
| indium | (noun) a rare soft silvery metallic element; occurs in small quantities in sphalerite | Synonyms: atomic number 49, In |
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| indument | (noun) a covering of fine hairs (or sometimes scales) as on a leaf or insect | Synonyms: indumentum |
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| indumentum | (noun) a covering of fine hairs (or sometimes scales) as on a leaf or insect | Synonyms: indument |
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| indusium | (noun) a membrane enclosing and protecting the developing spores especially that covering the sori of a fern | - |
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| infundibulum | (noun) any of various funnel-shaped parts of the body (but especially the hypophyseal stalk) | - |
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| inhumaneness | (noun) the quality of lacking compassion or consideration for others | Synonyms: inhumanity |
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| inhumanity | (noun) an act of atrocious cruelty | Synonyms: atrocity |
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| (noun) the quality of lacking compassion or consideration for others | Synonyms: inhumaneness |
| inhumation | (noun) the ritual placing of a corpse in a grave | Synonyms: burial, entombment, interment, sepulture |
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| innumerableness | (noun) a number beyond counting | Synonyms: countlessness |
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| inoculum | (noun) a substance (a virus or toxin or immune serum) that is introduced into the body to produce or increase immunity to a particular disease | Synonyms: inoculant |
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| instrument | (noun) the means whereby some act is accomplished | Synonyms: tool |
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| (noun) a device that requires skill for proper use | - |
| (noun) any of various devices or contrivances that can be used to produce musical tones or sounds | Synonyms: musical instrument |
| (noun) (law) a document that states some contractual relationship or grants some right | Synonyms: legal document, legal instrument, official document |
| (noun) the semantic role of the entity (usually inanimate) that the agent uses to perform an action or start a process | Synonyms: instrumental role |
| (noun) a person used by another to gain an end | Synonyms: cat's-paw, pawn |
| instrumentalism | (noun) a system of pragmatic philosophy that considers idea to be instruments that should guide our actions and their value is measured by their success | - |
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| instrumentalist | (noun) someone who plays a music as a profession | Synonyms: musician, player |
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| instrumentality | (noun) an artifact (that is instrumental in accomplishing some end) for accomplishing some end | Synonyms: instrumentation, means |
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| (noun) the quality of being instrumental for some purpose | - |
| (noun) a subsidiary organ of government created for a special purpose | - |
| instrumentation | (noun) the act of providing or using the instruments needed for some implementation | - |
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| (noun) the act of arranging a piece of music for an orchestra and assigning parts to the different musical instruments | Synonyms: orchestration |
| (noun) an artifact (that is instrumental in accomplishing some end) for accomplishing some end | Synonyms: instrumentality, means |
| (noun) the instruments called for in a musical score or arrangement for a band or orchestra | - |
| integument | (noun) an outer protective covering such as the skin of an animal or a cuticle or seed coat or rind or shell | - |
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| interregnum | (noun) the time between two reigns, governments, etc. | - |
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| intumescence | (noun) the increase in volume of certain substances when they are heated (often accompanied by release of water) | Synonyms: intumescency, swelling |
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| (noun) swelling up with blood or other fluids (as with congestion) | Synonyms: intumescency |
| intumescency | (noun) the increase in volume of certain substances when they are heated (often accompanied by release of water) | Synonyms: intumescence, swelling |
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| (noun) swelling up with blood or other fluids (as with congestion) | Synonyms: intumescence |
| iridium | (noun) a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium | Synonyms: atomic number 77, Ir |
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| ischium | (noun) one of the three sections of the hipbone; situated below the ilium | Synonyms: ischial bone, os ischii |
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| jejunum | (noun) the part of the small intestine between the duodenum and the ileum | - |
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| jorum | (noun) a large drinking bowl | - |
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| (noun) the quantity that a jorum will hold. | - |