14 letters
- nonspectacular27
- nonspeculative28
- nonstatistical20
- nonsupervisory26
- nonsymmetrical28
- nonsynchronous26
- nonvegetarians23
- normalizations29
- nucleoproteins24
- nullifications25
- octodecillions24
- ombudsmanships31
- orchestrations20
- ornamentations20
- ornithischians23
- overassertions19
- overattentions20
- overcompensate28
- overconstructs26
- overeducations24
- overexpansions30
- overextensions27
- overinflations24
- overnutritions21
- oversecretions22
- overvaluations25
- oxyhemoglobins35
- paediatricians22
- palletizations29
- pansexualities27
- participations24
- patronizations28
- pelletizations29
- peptidoglycans30
- perambulations26
- peregrinations21
- periodizations28
- perseverations22
- petrifications24
- photoelectrons24
- photoemissions23
- photoreactions23
- photosensitive24
- photosensitize29
- phycoerythrins29
- phytopathogens29
- phytoplanktons31
- picturizations31
- pidginizations31
- pluralizations30
- podsolizations29
- podzolizations38
- pontifications25
- posttensioning22
- preadaptations22
- precipitations24
- precombustions28
- preconceptions28
- preconsciouses25
- preconsciously28
- preconsonantal24
- preconstructed26
- preconventions27
- preconvictions29
- predominations23
- prefigurations24
- prehensilities21
- premeditations22
- premenstrually26
- prenominations23
- preoccupations28
- preordinations20
- prepossessions21
- preproductions26
- pretensionless20
- pretermissions21
- prevarications25
- privatizations31
- proconsulships28
- proliferations22
- pronunciations24
- prostaglandins23
- psychosurgeons28
- pulverizations33
- qualifications32
- quindecillions32
- radiosensitive20
- randomizations29
- ratiocinations19
- reacquisitions28
- reaffirmations24
- reaggregations21
- reapplications25
- reattributions19
- recalculations24
- recalibrations22
- reciprocations24
- recirculations23
- recombinations25
- recompilations25
- recompositions24
- recomputations25
- reconsecrating24
- reconsecration22
- reconsolidated21
- reconsolidates20
- reconstituting22
- reconstitution20
- reconstructing25
- reconstruction23
- reconstructive26
- reconstructors22
- recriminations22
- rectifications24
- redescriptions22
- redispositions19
- reduplications24
- reexaminations26
- reexportations25
- reforestations18
- reformulations23
- refrigerations20
- regimentations21
- regurgitations20
- reimportations21
- reincarnations20
- reinfestations19
- reinnervations21
- reinoculations21
- reinstallation18
- reinstatements19
- reintegrations18
- relubrications23
- remonstrations19
- renegotiations18
- reorientations16
- republications26
- repunctuations24
- resegregations19
- responsibility24
- responsiveness23
- restimulations20
- resuscitations19
- retransferring21
- retransforming24
- retranslations17
- retransmission19
- retransmitting21
- retroflections22
- retrogressions17
- retrospections21
- reunifications23
- reutilizations26
- revaccinations26
- reverberations22
- rhythmizations33
- ritualizations26
- routinizations26
- ruggedizations30
- sansculottisms23
- scarifications24
- scintillations21
- scleroproteins22
- sedimentations20
- semiporcelains25
- sensationalise17
- sensationalism20
- sensationalist17
- sensationalize26
- sensiblenesses20
- sensitisations16
- sensitizations25
- sensitometries18
- sensualization27
- sensuousnesses18
- sequestrations25
- serializations25
- sexploitations26
- sexualizations33
- signalizations28
- significations24
- socializations28
- solemnizations29
- somatotrophins23
- sovietizations28
- specifications27
- spectinomycins30
- spokesmanships30
- sporopollenins24
- sportsmanships26
- stabilizations28
- statesmanships23
- sterilizations25
- strangulations20
- structurations20
- suballocations24
- subcollections27
- subcommissions28
- subconsciouses26
- subconsciously29