14 letters
- hypercriticism30
- hyperefficient31
- hyperemotional26
- hyperenergetic27
- hyperesthesias23
- hypereutectoid26
- hyperexcitable35
- hyperexcretion32
- hyperextending33
- hyperextension30
- hyperfunctions30
- hyperglycemias32
- hypergolically31
- hyperimmunized39
- hyperimmunizes38
- hyperinflation27
- hyperirritable25
- hyperkeratoses25
- hyperkeratosis25
- hyperkeratotic28
- hyperlipidemia29
- hypermasculine30
- hypermetabolic31
- hypermetropias27
- hypermodernist26
- hyperparasites24
- hyperparasitic27
- hyperpigmented31
- hyperpituitary27
- hyperpolarized35
- hyperpolarizes34
- hyperproducers29
- hyperrealistic25
- hypersecretion25
- hypersensitive26
- hypersensitize31
- hypersexuality32
- hypersonically29
- hyperstimulate26
- hypertrophying31
- hyperurbanisms29
- hyperuricemias28
- hyperventilate27
- hypervigilance32
- hyperviscosity30
- hypnotherapies27
- hypnotherapist27
- hypoallergenic29
- hypodermically32
- hysterectomies24
- illiberalities20
- illiterateness17
- immaterialisms24
- immaterialists21
- immaterialized31
- immaterializes30
- immoderateness22
- imperativeness25
- impercipiences30
- impermanencies28
- impermeability29
- impersonalized32
- impersonalizes31
- impersonations22
- impertinencies25
- imperviousness26
- impoverishment30
- impropernesses24
- inadvertencies24
- inalterability22
- incarcerations22
- inconsiderable24
- inconsiderably26
- indecipherable28
- indeterminable24
- indeterminably26
- indeterminisms23
- indeterminists20
- indifferencies26
- indifferentism26
- indifferentist23
- indiscoverable27
- inexpertnesses26
- inheritability23
- intelligencers23
- interanimation20
- interbehaviors24
- intercalations20
- intercessional20
- intercommunion27
- intercommunity28
- intercomparing27
- interconnected24
- interconverted24
- intercorporate21
- intercorrelate19
- interdependent22
- interdepending24
- interdialectal21
- interdiffusing26
- interdiffusion24
- interdigitated19
- interdigitates18
- interelectrode20
- interfaculties23
- interferential20
- interferograms23
- interferometer21
- interferometry23
- interfertility21
- intergradation19
- interinfluence25
- interinvolving28
- interjectional29
- interlacements23
- interlineation18
- intermarriages20
- intermediacies22
- intermediaries19
- intermediately22
- intermediating22
- intermediation20
- intermenstrual21
- intermetallics23
- intermittences22
- intermittently22
- intermolecular24
- internationals18
- internucleonic25
- interobservers22
- interoperative22
- interparochial24
- interpellating23
- interpellation21
- interpellators20
- interpenetrate19
- interpermeated22
- interpermeates21
- interplanetary22
- interpolations20
- interpositions19
- interpretation19
- interpretative22
- interpretively25
- interpupillary26
- interrelatedly20
- interrelations17
- interreligious19
- interrogations18
- interrogatives21
- intersectional20
- intersegmental22
- intersexuality26
- interspersions19
- intersterility18
- interstitially19
- intertextually27
- intertwinement23
- intervalometer23
- intervertebral23
- intolerability22
- intolerantness18
- introversively26
- isomerizations27
- isoproterenols19
- kapellmeisters26
- keratinization29
- keratinophilic28
- keratoplasties22
- kindergartener23
- kindergartners23
- knickerbockers36
- knuckleballers33
- landownerships26
- lateralization26
- lepidopterists22
- letterspacings24
- lexicographers32
- liberalization29
- liberationists19
- libertarianism22
- literalization26
- literarinesses16
- literatenesses16
- liverishnesses22
- lubberlinesses24
- magnetospheres25
- magnetospheric28
- maladministers23
- malapertnesses22
- mannerlinesses21
- masterlinesses19
- materialnesses19
- mercantilistic25
- mercaptopurine28
- mercerizations30
- merchandisings27
- merchandizings36
- mercifulnesses26
- meretriciously24