17 letters
- mountainousnesses25
- multidisciplinary33
- multiprogrammings36
- multitudinousness27
- nondenominational27
- nondiscrimination28
- nondiscriminatory29
- nonentertainments25
- nonindustrialized33
- nonmanufacturings34
- nonreappointments30
- opinionatednesses24
- overcommunicating38
- overindustrialize34
- overorchestrating29
- overproportioning31
- perfunctorinesses29
- persnicketinesses29
- phenylethylamines35
- photodisintegrate26
- photodissociating29
- photointerpreters26
- photoreactivating32
- photosynthesizing39
- phototypesettings30
- pithecanthropines32
- plainspokennesses31
- predestinarianism26
- predeterminations26
- preincorporations28
- professionalizing37
- provincialization39
- psycholinguistics35
- reconceptualizing41
- recontextualizing42
- reindustrializing33
- reinterpretations22
- revolutionariness25
- ribonucleoprotein30
- rudimentarinesses24
- scandalmongerings32
- straightjacketing40
- subordinatenesses24
- superintellectual29
- superintelligence30
- superintendencies28
- superminicomputer35
- teleconferencings32
- teratocarcinomata27
- thermoluminescent32
- tintinnabulations26
- totalitarianizing31
- transdisciplinary29
- transilluminating28
- transillumination26
- transilluminators25
- triboluminescence33
- triiodothyronines24
- trustworthinesses24
- ultracentrifuging32
- ultraminiaturized34
- uncomprehendingly38
- unforgivingnesses32
- uninhibitednesses27
- unintelligibility30
- valetudinarianism29
- videoconferencing36