15 letters
- nontotalitarian19
- nonutilitarians20
- novemdecillions30
- nucleophilicity32
- obliviousnesses25
- observabilities26
- obtainabilities23
- occidentalizing36
- oligodendrocyte26
- oligodendroglia24
- oligomerization31
- oligonucleotide25
- oligosaccharide27
- operationalisms23
- operationalists20
- organometallics26
- orthogonalities21
- orthogonalizing33
- osteomyelitides22
- overapplication30
- overcapitalized36
- overcapitalizes35
- overcentralized34
- overcentralizes33
- overcompliances33
- overcomplicated33
- overcomplicates32
- overcontrolling28
- overembellished30
- overembellishes29
- overfamiliarity28
- overfertilizing35
- overgeneralized33
- overgeneralizes32
- oversimplifying34
- overspecialized36
- overspecializes35
- overstabilities23
- overutilization31
- oxytetracycline34
- painterlinesses21
- palatalizations30
- parajournalisms33
- paralinguistics26
- paranormalities23
- pararosanilines21
- parasexualities27
- parliamentarian24
- patentabilities23
- penetrabilities23
- perdurabilities24
- perishabilities24
- personalization30
- phenomenalistic29
- photoduplicated30
- photoduplicates29
- photojournalism35
- photojournalist32
- photolithograph30
- photomultiplier29
- pluralistically28
- poliomyelitides26
- politicizations32
- polycrystalline29
- postpollination25
- preestablishing27
- preferabilities25
- prepublications30
- professionalism26
- professionalize32
- profitabilities25
- programmability32
- promotabilities25
- proportionality25
- provincialities27
- provincializing39
- psychedelically34
- psycholinguists30
- psychosexuality36
- punctiliousness26
- punishabilities26
- quadruplicating37
- quadruplication35
- quadruplicities34
- quarterfinalist30
- quintuplicating37
- radicalizations30
- rationalization27
- reacclimatizing37
- reasonabilities20
- recallabilities24
- recanalizations30
- recognizability36
- reconceptualize36
- reconcilability29
- reconciliations24
- reconsolidating24
- recontextualize37
- recrystallizing34
- reduplicatively31
- reeligibilities22
- reestablishment25
- reformabilities25
- refundabilities25
- regionalization29
- rehabilitations22
- rehospitalizing33
- reindustrialize28
- religiousnesses20
- relinquishments33
- rematerializing31
- remediabilities23
- rememberability30
- remobilizations32
- renationalizing30
- renormalization30
- repairabilities22
- repeatabilities22
- replicabilities26
- reproducibility29
- republicanizing39
- requalification33
- resectabilities22
- resistibilities19
- resocialization29
- respiritualized30
- respiritualizes29
- reversibilities23
- revisualization31
- revitalizations30
- ritualistically24
- sacramentalisms26
- sacramentalists23
- semicolonialism27
- semicrystalline26
- semicylindrical30
- sensationalised19
- sensationalises18
- sensationalisms21
- sensationalists18
- sensationalized28
- sensationalizes27
- sensualizations28
- sentimentalised22
- sentimentalises21
- sentimentalisms24
- sentimentalists21
- sentimentalized31
- sentimentalizes30
- septendecillion26
- sidesplittingly26
- silicifications26
- simplifications29
- sinterabilities20
- socialistically26
- sociolinguistic26
- solderabilities21
- solidifications24
- solipsistically26
- solitudinarians20
- solubilizations31
- specialisations23
- specializations32
- spreadabilities23
- sprightlinesses24
- squeezabilities38
- structuralizing33
- subspecializing38
- subvocalization37
- succinylcholine33
- supernaturalism25
- supernaturalist22
- superspecialist26
- suppressibility28
- survivabilities28
- tatterdemalions21
- territorialisms19
- territorialists16
- territorialized26
- territorializes25
- theatricalities21
- theatricalizing33
- thermalizations31
- thermostability26
- thromboembolism33
- totalitarianism20
- totalitarianize26
- traditionalisms21
- traditionalists18
- traditionalized28
- traditionalizes27
- transferability25
- translatability23
- transliterating20
- transliteration18
- transsexualisms28
- trivializations30
- ultraliberalism25
- ultravirilities22
- unacceptability32