13 letters
- homologations22
- humanizations30
- humifications26
- hybridization31
- hydrogenation22
- hydroxylation29
- hypercautious25
- hyperfunction29
- hyperrational22
- hypertensions22
- hypothecation26
- idealizations25
- idiomatically24
- idiomaticness21
- idiosyncratic23
- ignominiously24
- illocutionary22
- illuminations21
- illusionistic20
- illustrations17
- illustriously20
- immigrational23
- immoderations21
- immunizations31
- impecuniosity26
- impecuniously28
- imperfections26
- imperiousness21
- impersonation21
- implantations22
- impregnations23
- impressionism23
- impressionist20
- improvisation24
- inactivations22
- inaugurations19
- incantational20
- incarceration21
- incardination20
- incinerations19
- inclinational21
- incorporation21
- incorruptions22
- incrimination22
- incrustations19
- incuriosities18
- incuriousness20
- indiscretions19
- indisposition19
- individuation22
- industriously20
- inefficacious27
- inferiorities17
- infibulations23
- infiltrations19
- inflammations25
- inflationisms22
- inflationists19
- informational22
- ingeniousness19
- ingratiations17
- ingurgitation20
- inhabitations20
- injudiciously32
- injuriousness26
- inosculations20
- inquisitional26
- insanitations16
- inscriptional22
- inseminations19
- insidiousness17
- inspirational19
- inspissations18
- installations17
- instantiation16
- instaurations16
- instillations17
- institutional17
- instructional20
- insufflations23
- insurrections19
- intellections20
- intenerations16
- intensionally20
- intentionally20
- interactional19
- interbehavior23
- intercalation19
- interceptions21
- intercessions18
- interdictions19
- interdominion20
- interiorising17
- interiorities14
- interiorizing26
- interjections27
- intermissions18
- international17
- interpolation19
- interposition18
- interregional18
- interrelation16
- interrogation17
- interruptions19
- intersections18
- intersessions15
- interspersion18
- interventions20
- intimidations19
- intoxications25
- introductions20
- introgression17
- introjections27
- intromissions18
- introspection21
- introversions19
- intuitionisms19
- intuitionists16
- invaginations22
- invalidations21
- investigation21
- invidiousness21
- invigilations22
- invigorations21
- inviolability25
- inviolateness20
- invitationals20
- iontophoreses19
- iontophoresis19
- iontophoretic22
- irrationalism18
- irrationalist15
- irrationality17
- irreligionist17
- irreligiously20
- irresolutions16
- isolationisms18
- isolationists15
- isomerization26
- italicization27
- jollification31
- judiciousness29
- jurisdictions28
- justification30
- juxtaposition34
- kinesiologies21
- labanotations19
- labialization28
- laboriousness19
- laterizations24
- latinizations25
- legalizations27
- legitimations20
- liberationist18
- lignification24
- linearization25
- liquefactions31
- lithification23
- litigiousness18
- localizations28
- luteinization26
- luxuriousness25
- machicolation26
- magnetization29
- magnification26
- malabsorption24
- maladaptation22
- malariologies20
- malariologist20
- malformations24
- malfunctioned27
- maliciousness22
- malnutritions20
- malocclusions26
- malversations22
- manifestation21
- manipulations23
- marchionesses22
- martyrization28
- masturbations21
- matriculation22
- maximizations36
- mechanization32
- melanizations28
- melodiousness20
- memorizations29
- menstruations19
- mercerization29
- meritoriously20
- mesotheliomas22
- metafictional24
- metallization28
- microbiologic28
- millionairess19
- minimizations30
- ministrations18
- misallocation22
- misassumption24
- miscaptioning26
- miscegenation23