13 letters
- ineffectively30
- ineffectually28
- inexactitudes26
- inexactnesses25
- infectivities24
- insectivorous22
- inspectorates20
- inspectorship25
- instinctively25
- instinctually23
- instructional20
- instructively25
- insurrections19
- intellections20
- intellectuals21
- interactional19
- interactively24
- interconnects22
- interdictions19
- interdistrict18
- interelectron19
- intergalactic23
- interjections27
- intersections18
- intragalactic23
- introductions20
- introjections27
- introspecting23
- introspection21
- introspective24
- invectiveness26
- isoelectronic21
- jurisdictions28
- lactobacillus26
- lactoglobulin26
- laryngectomee25
- liquefactions31
- malfunctioned27
- manufactories24
- manufacturers25
- manufacturing28
- mastoidectomy25
- metafictional24
- microinjected33
- micropuncture28
- misconducting28
- misconnecting27
- misconnection25
- misdirections21
- misfunctioned26
- multifunction27
- multispectral25
- mycobacterial28
- mycobacterium31
- myoelectrical26
- nephrectomies25
- nephrectomize34
- noctambulists25
- nonarchitects23
- noncharacters23
- noncollectors23
- nonconducting27
- nonconduction25
- nonconductive28
- nonconductors24
- nonconnection24
- nondeductible25
- noneffectives28
- nonelectrical23
- nonelectronic23
- nonfunctional25
- noninfectious23
- nonpracticing27
- nonproductive27
- nonreflecting25
- nonrestricted19
- nonretractile19
- nonstructural21
- nonstructured21
- nonsubjective35
- objectionable33
- objectionably35
- objectiveness33
- objectivistic35
- objectivities32
- obstructively27
- octodecillion23
- octogenarians20
- octosyllabics26
- octosyllables24
- olfactometers23
- ovariectomies23
- overabstracts23
- overconstruct25
- overcorrected24
- overdirecting24
- overprotected24
- overreactions21
- perfectionism26
- perfectionist23
- perfectnesses23
- perfunctorily27
- perissodactyl23
- perspectively29
- petrifactions23
- photodetector22
- photoelectric25
- photoelectron23
- photoproducts26
- photoreaction22
- pictographies26
- pictorialisms23
- pictorialists20
- pictorialized30
- pictorializes29
- pictorialness21
- picturephones26
- picturesquely33
- picturization30
- piezoelectric32
- pneumonectomy30
- polydactylies26
- postdoctorate20
- postfractures23
- postinfection24
- postinjection30
- postvasectomy28
- practicalness24
- practitioners20
- preconviction28
- predilections22
- preinductions23
- preproduction25
- presanctified24
- preselections21
- prestructured22
- prestructures21
- proctological26
- proctologists22
- projectionist29
- prophylactics30
- prospectively29
- prostatectomy24
- protactiniums24
- protectionism23
- protectionist20
- protectorates19
- protectorship24
- protectresses19
- punctiliously26
- punctualities23
- putrefactions24
- radioactively24
- radioactivity23
- rarefactional21
- reactionaries17
- reactivations21
- recollections22
- reconnections22
- reconstructed22
- reconstructor21
- reconvictions25
- rectangularly24
- rectification23
- rectilinearly21
- rectitudinous20
- redistricting20
- reductionisms22
- reductionists19
- reductiveness23
- reflectometer23
- reflectometry25
- reflectorized30
- reflectorizes29
- refractometer22
- refractometry24
- reindictments22
- reinspections21
- remanufacture25
- reproductions22
- reproductives25
- repunctuation23
- resectability22
- restrictively23
- restructuring21
- resurrections18
- retroactively23
- retroactivity22
- retrodictions18
- retroflection21
- retrospecting22
- retrospection20
- retrospective23
- revictualling26
- sacrosanctity22
- sanctimonious22
- satisfactions20
- sectarianisms20
- sectarianized27
- sectarianizes26