12 letters
- intonational16
- intoxication24
- intransigent17
- intransitive18
- introjection26
- intromission17
- introversion18
- invagination21
- investigator19
- invigoration20
- invitational19
- invitatories17
- invocational22
- ironicalness18
- isoantigenic19
- isolationist14
- itinerancies17
- itinerations14
- jactitations25
- laciniations18
- mastications19
- metrications19
- ministration17
- miscitations19
- miscreations19
- nationalises15
- nationalists15
- negativistic22
- negotiations16
- nitrosamines17
- nonabstracts20
- nonactivated22
- nonassertive18
- nonbotanists18
- noncognitive24
- nonconstants19
- noncountries19
- nondecisions19
- nonimitative21
- noninitiates15
- noninterests15
- nonintrusive20
- nonintuitive20
- nonnarrative19
- nonnormative22
- nonnutritive20
- nonobservant22
- nonparasitic20
- nonpartisans18
- nonrealistic18
- nonresistant15
- nonscientist18
- nonsectarian18
- nonsensitive19
- nonsocialist18
- nonstrategic19
- notarization23
- notification20
- nutritionist15
- observations20
- obstetrician19
- octogenarian19
- onomastician20
- operationist16
- opinionative21
- organicities18
- organisation16
- orientalists14
- orientations14
- originations16
- ossification19
- ostentations14
- ostentatious14
- overcastings22
- overcautions21
- overtaxation24
- pancreatitis19
- partitionist16
- pectinations20
- personations17
- potentiation17
- potentiators16
- precisionist19
- protestation16
- ratification19
- ratiocinated17
- ratiocinates16
- ratiocinator16
- rationalises14
- rationalists14
- rationalness15
- reactivating22
- reactivation20
- reactivities19
- reanimations17
- recantations17
- recognitions19
- reconditions18
- reconviction24
- reifications19
- reinventions19
- relativistic20
- remotivation20
- renomination18
- renunciation19
- resignations16
- restitutions14
- restorations13
- restrictions16
- retaliations14
- retroactions16
- reunionistic18
- revisionists17
- romanticises19
- romanticists19
- rottenstones14
- rustications17
- salvationist18
- sanctimonies20
- sanitization23
- satisfaction19
- scatteration16
- sectarianism19
- semioticians19
- separatistic18
- sinfoniettas17
- solicitation17
- somatostatin16
- stationeries13
- statistician16
- sternocostal17
- sternutation15
- strontianite14
- sustentation15
- terminations17
- tetanization23
- tortuosities13
- totalisators13
- transactions17
- transections17
- transfection20
- transiencies17
- transitional15
- transitivity19
- translations15
- translocates17
- transmontane18
- transoceanic20
- transpontine18
- transvestite17
- trepanations17
- unattractive21
- uncinariases18
- uncinariasis18
- unconstraint19
- unionisation16
- vacationists20
- vaccinations24
- varicosities19
- variegations19
- vaticinating23
- vaticination21
- vaticinators20
- ventilations19
- verification23
- vincristines21
- vindications22
- virtuosities17
- visitatorial17
- vivisections24
- vociferation23