13-letter words
There are 7,827 thirteen-letter words in our dictionary. The most common are EXTRAPOLATING, EXTRAPOLATION, EXTRAVAGANCES, EXTRAVAGANTLY and EXTRAVAGANZAS.
Long words like these rarely fit in one go, but they are the answers to many jumbles, spelling challenges and word-ladder puzzles. Most are built from a shorter root plus a common prefix or suffix.
13-letter words
- extrapolating23
- extrapolation22
- extravagances26
- extravagantly27
- extravaganzas33
- extravasation23
- factorization27
- faithlessness19
- falsification21
- familiarising19
- familiarizing28
- fascinatingly22
- featherweight26
- felicitations18
- fermentations18
- ferroelectric20
- ferromagnetic21
- fictionalised19
- fictionalized28
- filibustering19
- fingerpicking26
- fingerprinted20
- flabbergasted22
- flamethrowers24
- flexibilities25
- flirtatiously19
- floodlighting22
- foregrounding19
- foreknowledge25
- foreshadowing24
- foreshortened20
- forgetfulness20
- formalization27
- fortification21
- fortuneteller16
- fossiliferous19
- fossilization25
- fractionation18
- frighteningly24
- frustratingly20
- functionalism20
- functionalist18
- functionaries18
- galactosidase17
- gastrocnemius18
- gastronomical18
- generalissimo16
- generalizable25
- genitourinary17
- geochronology23
- geometrically21
- geomorphology25
- geophysicists24
- geoscientists16
- geostationary17
- germanization25
- gerontologist15
- gerrymandered21
- gesticulating17
- ghettoization26
- glorification19
- glycoproteins21
- glycosylation22
- gonadotropins17
- governorships22
- grammatically23
- grandfathered22
- grandfatherly24
- grandiloquent24
- grandmotherly23
- grandstanding17
- granulomatous16
- groundskeeper21
- gynecological22
- gynecologists20
- halfheartedly26
- hallucinating19
- hallucination18
- hallucinatory21
- hallucinogens19
- handkerchiefs29
- harmonization27
- healthfulness22
- heartbreakers22
- heartlessness16
- hemagglutinin20
- hematological21
- hematopoiesis20
- hematopoietic22
- hemicellulose20
- hemispherical25
- hermaphrodite24
- hermeneutical20
- herpetologist19
- heterogeneity20
- heterosexuals23
- heterotrophic23
- heterozygotes29
- heuristically21
- hieroglyphics27
- holidaymakers26
- homeomorphism27
- homeschoolers23
- homeschooling24
- homoeroticism22
- homogeneously22
- homomorphisms27
- housebreaking23
- housecleaning19
- huckleberries24
- humanitarians18
- hundredweight25
- hyaluronidase20
- hybridization31
- hydraulically25
- hydrocephalus27
- hydrochloride26
- hydrodynamics28
- hydrogenation21
- hydroperoxide30
- hydroxylamine32
- hydroxylation30
- hyperactivity29
- hypercalcemia27
- hypercritical25
- hyperextended30
- hyperglycemia29
- hyperglycemic31
- hyperhidrosis25
- hypermobility28
- hypersurfaces26
- hypertrophied27
- hyperuricemia25
- hypervelocity29
- hypochondriac29
- hypothesizing34
- idiomatically21
- idiosyncratic21
- ignominiously19
- illuminations15
- illusionistic15
- imaginatively22
- immortalizing27
- immunizations26
- immunological20
- immunologists18
- immunosorbent19
- immunotherapy25
- imperceptible23
- imperceptibly26
- imperialistic19
- impermissible21
- impermissibly24
- impersonating18
- impersonation17
- impersonators17
- imperturbable21
- imponderables20
- impoverishing24
- impracticable23
- impressionism19
- impressionist17
- imprisonments19
- improbability24
- improprieties19
- improvisatory23
- impulsiveness20
- inaugurations14
- incandescence20
- incandescents18
- incapacitates19
- incarcerating18
- inclusiveness18
- incommunicado22
- incompetently22
- inconceivably25
- incongruities16
- incongruously19
- inconspicuous19
- incontestable17
- incontestably20
- incorporators17
- incorrectness17
- incorruptible19
- incredulously19
- incrementally20
- incrimination17
- indefatigable20
- indefatigably23
- indescribable20
- indescribably23
- indeterminacy21
- indeterminate16
- indifferently23
- indiscernible18
- indiscretions16
- indisposition16
- individualist18
- individualize27
- individuation18
- indoctrinated17
- industrialism16
- industrialist14
- industrialize23
- industriously17
- ineffectively27
- ineffectually24
- inefficiently24
- ineligibility19
- inevitability21
- inexhaustible25
- inexpensively28
- inexpressible24
- infallibility21
- infiltrations16
- infinitesimal18
- inflammations20
- inflexibility28
- inflorescence20
- infringements19
- infuriatingly20
- inhomogeneity22
- inhomogeneous19
- inquisitively28
- inquisitorial22
- insectivorous18
- insensibility18
- insensitively19
- insensitivity19
- instabilities15
- instantiating14
- instantiation13
- instinctually18
- instrumentals15
- insubordinate16
- insubstantial15
- insufficiency26
- insupportable19
- insurrections15
- intangibility19
- integrability19
- integumentary19
- intelligencer16
- intelligences16
- interactional15
- interactively21
- interbreeding17
- intercalation15
- intercellular15
- intercessions15
- interchanging20
- intercolonial15
- intercommunal19
- interconnects17
- intercultural15
- interferences18
- intergalactic18
- interjections22
- interlocutors15
- interlocutory18
- intermarriage16
- intermarrying19
- intermediates16
- intermetallic17
- intermingling17
- intermissions15
- intermittency20
- intermountain15
- internalizing23
- interoperable17
- interpolating16
- interpolation15
- interposition15
- interpretable17
- interregional14
- interrelation13
- interrogating15
- interrogative17
- interrogators14
- interrogatory17
- interspecific22
- interspersing16
- intertropical17
- intracerebral17
- intramuscular17
- intransigence16
- intrapersonal15
- intraspecific22
- intravascular18
- intravenously19
- introgression14
- introspection17
- introspective20
- intrusiveness16
- inventiveness19
- invertebrates18
- investigatory20
- invincibility23
- inviolability21
- invitationals16
Other word lengths
13-letter words starting with
13-letter words ending in
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