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English Words Starting With H

5,990 entries — pick a word to see its definition, pronunciation, and usage.

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Noun Verb Adjective Adverb Plural noun Combining form Verb (transitive)Verb (intransitive)Verb (ambitransitive)

heptadecanoic acid
nounExtremely Low (Academic/Tech)
/ˌhɛptəˌdɛkəˈnəʊɪk ˈæsɪd/A saturated fatty acid with seventeen carbon atoms, a solid at room temperature.
heptagon
nounC2
/ˈhɛptəɡən/A plane geometric figure with seven straight sides and seven angles.
heptahedron
nounVery Low
/ˌhɛptəˈhiːdrən/A three-dimensional geometric solid with seven plane faces.
heptahydrate
nounLow
/ˌhɛptəˈhaɪdreɪt/A crystalline compound containing seven molecules of water of hydration per formula unit.
heptameter
nounLow
/hɛpˈtæmɪtə/A line of verse consisting of seven metrical feet.
heptane
nounC2
/ˈhɛpteɪn/A colourless flammable liquid hydrocarbon of the alkane series, C₇H₁₆, with seven carbon atoms.
heptanedioic acid
nounVery low / Highly specialized
/ˌhɛpteɪnˈdaɪoʊɪk ˈæsɪd/An organic chemical compound with the formula HOOC(CH₂)₅COOH, consisting of a seven-carbon chain with two carboxylic acid groups.
heptanone
nounVery Low / Technical
/ˈhɛptəˌnəʊn/A ketone with seven carbon atoms in its molecular structure.
heptarchy
nounC2
/ˈhɛptɑːki/A political structure consisting of seven separate kingdoms or regions.
heptastich
nounVery Rare / Technical
/ˈhɛptəstɪk/A stanza, poem, or piece of verse consisting of seven lines.
heptasyllable
nounC2
/ˌhɛptəˈsɪləbl/A word or line of verse consisting of seven syllables.
heptateuch
nounVery Low (C2)
/ˈhɛptətjuːk/A set of the first seven books of the Old Testament or Hebrew Bible (Genesis, Exodus, Leviticus, Numbers, Deuteronomy, Joshua, Judges).
heptathlon
nounC1
/hɛpˈtæθlən/An athletic competition consisting of seven different track and field events.
heptode
nounVery Low
/ˈhɛptəʊd/A thermionic valve (vacuum tube) containing seven electrodes, typically an anode, a cathode, and five grids.
heptose
nounVery Low
/ˈhɛptəʊz/A monosaccharide sugar containing seven carbon atoms.
hepworth
nounC2
/ˈhɛpwəθ/A proper noun most commonly used as a surname of English origin, often associated with the 20th-century British sculptor Dame Barbara Hepworth.
hepzibah
nounVery low
/ˈhɛpzɪbə/A female given name of Hebrew origin, often with historical or literary connotations.
her
determinernounpronounA1 (Extremely High Frequency)
/hə(r)/ (weak form), /hɜː(r)/ (strong form)Used as the object form of the female third-person singular pronoun 'she'; also used as a possessive determiner (attributive adjective) indicating belonging or association with a female person, animal, or personified thing previously mentioned or understood.
hera
nounExtremely Rare (Technical Jargon, Historical)
/ˈhɪərə/A unit of measurement used in radio engineering and telecommunications, equal to one cycle per second, equivalent to the hertz.
heraclea
nounRare / Technical
/ˌhɛrəˈkliːə/A proper noun referring to a genus of flowering plants, or a historical city name.

Showing 2501–2520 of 5990 words.