12 letters
- hypnotherapy27
- hypodermises23
- hypothermias24
- hysterectomy24
- hysterically23
- iconographer23
- illiberalism21
- illiberality20
- illiteracies17
- illiterately17
- immobilizers31
- immoderacies22
- immoderately22
- immoderation20
- immortalizer28
- imperatively25
- imperatorial19
- imperceptive28
- impercipient25
- imperfection25
- imperfective28
- imperialisms22
- imperialists19
- imperilments23
- imperishable24
- imperishably26
- impermanence26
- impermanency28
- impersonally23
- impersonated20
- impersonates19
- impersonator19
- impertinence23
- impertinency25
- imperviously26
- implementers23
- imponderable24
- imponderably26
- impoverished25
- impoverisher24
- impoverishes24
- improperness22
- inadvertence22
- inadvertency24
- incarcerated20
- incarcerates19
- incertitudes18
- incinerating20
- incineration18
- incinerators17
- inclinometer21
- incoherences22
- incoherently22
- indemnifiers21
- indifference24
- indifferency26
- ineradicable21
- ineradicably23
- inexperience27
- inexpertness24
- infomercials23
- ingatherings20
- inheritances19
- inheritrices18
- inheritrixes22
- innervations19
- innumeracies21
- inobservance24
- inoperculate21
- insufferable24
- insufferably26
- intemperance23
- intenerating17
- inteneration15
- intensifiers17
- interactants17
- interactions17
- interallelic19
- interbedding21
- interborough21
- intercalated18
- intercalates17
- intercepters19
- intercepting22
- interception20
- interceptors19
- intercession17
- intercessors16
- intercessory18
- interchained20
- interchanged22
- interchanger21
- interchanges21
- interchannel21
- intercluster18
- intercoastal17
- intercompany25
- intercompare22
- interconnect21
- interconvert21
- intercoolers17
- intercostals17
- intercountry20
- intercourses17
- intercropped23
- intercrossed17
- intercrosses16
- interculture19
- intercurrent18
- intercutting20
- interdealers15
- interdepends19
- interdicting20
- interdiction18
- interdictive21
- interdictors17
- interdictory19
- interdiffuse21
- interestedly17
- interfacings22
- interfaculty23
- interference20
- interfertile17
- interfluvial23
- interfolding21
- interfusions18
- intergeneric19
- interglacial20
- intergrading19
- intergrafted19
- intergrowths20
- interinvolve23
- interiorised14
- interiorises13
- interiorized23
- interiorizes22
- interjecting28
- interjection26
- interjectors25
- interjectory27
- interknitted19
- interlaminar18
- interlapping23
- interlarding18
- interlayered17
- interleaving21
- interlending19
- interleukins20
- interlibrary19
- interlinears15
- interlinings18
- interlinking22
- interlobular19
- interlocking24
- interlocutor18
- intermarried17
- intermarries16
- intermeddled20
- intermeddler19
- intermeddles19
- intermediacy22
- intermediary19
- intermediate17
- intermeshing21
- interminable21
- interminably23
- intermingled21
- intermingles20
- intermission17
- intermitotic19
- intermittent17
- intermitters16
- intermitting19
- intermixture24
- intermontane18
- internalised16
- internalises15
- internalized25
- internalizes24
- interneurons16
- internuclear19
- internucleon20
- internuncial20
- internuncios19
- interoceanic20
- interoceptor19
- interorbital17
- interpellate18
- interplanted19
- interplaying22
- interpleaded19
- interpleader18
- interpluvial23
- interpolated18
- interpolates17
- interpolator17
- interpreters16
- interpreting19
- interpretive20
- interpsychic26