11 letters
- paleobotany21
- practicable24
- practicably26
- probational19
- probationer18
- rattlebrain16
- reprobation18
- robotically21
- technocracy25
- orthopaedic20
- parathyroid19
- periodontal17
- petrodollar17
- planetoidal18
- predicatory20
- predoctoral19
- pterodactyl21
- rallentando16
- recordation16
- redactional17
- rehydration17
- retardation13
- tetraploidy18
- orthocenter17
- parenthetic20
- penetration16
- perchlorate20
- perennially20
- pertinently19
- reciprocate20
- reconnoiter16
- reconnoitre16
- reincarnate16
- reoperation15
- repentantly19
- telocentric19
- theocentric20
- theoretical17
- palynologic24
- panegyrical23
- penological22
- percolating21
- placatingly24
- planetology21
- potlatching23
- potteringly20
- prattlingly21
- preachingly25
- procreating20
- protonating18
- protracting20
- reallotting16
- reattaching19
- renographic22
- reproaching22
- retroacting17
- rheological20
- technologic23
- teratologic17
- thanatology19
- theological20
- thallophyte22
- partitioner15
- patrilineal17
- pectination19
- pericranial19
- perionychia22
- pertinacity20
- petitionary17
- phonetician21
- pictorially21
- pinocytotic23
- piratically21
- pollination18
- preclinical23
- precritical21
- ratiocinate15
- rationality15
- reciprocity22
- repartition15
- replication19
- retaliation13
- rhetorician17
- titanically19
- prokaryotic23
- parenchymal26
- photometric22
- polarimetry20
- premonitory20
- preromantic21
- prominently22
- protonemata18
- reclamation19
- temporality20
- temporarily20
- thermically23
- toponymical24
- tracheotomy21
- trampoliner19
- pantropical22
- preparation18
- procephalic26
- prophetical23
- protopathic22
- protoplanet19
- reapportion18
- reportorial15
- oscillatory18
- osteopathic19
- pancreatins19
- paternalist16
- pentathlons19
- percolators18
- perorations15
- personality18
- personation16
- phalanstery20
- phytosterol19
- plainchants22
- plantations17
- pollinators17
- postconcert21
- postcranial19
- posteriorly17
- postnatally19
- potentillas17
- praetorians15
- pratincoles19
- procaryotes19
- prosaically21
- prostration15
- protections18
- prothoraces19
- protostelic18
- pyroclastic23
- pyrrhotites18
- rapscallion20
- reciprocals21
- relocations16
- reparations15
- replicators18
- restoration12
- retinoscopy20
- retractions15
- rhinoplasty20
- ritornellos14
- rototillers13
- sartorially15
- sectionally19
- spherically23
- spirochetal20
- spontaneity18
- stratocracy19
- sycophantic25
- synchrotron20
- syncopation21
- syntactical21
- technocrats20
- tetrasporic17
- theatricals17
- thiopentals18
- thrasonical18
- tolerations13
- topnotchers20
- torsionally16
- transaction16
- transalpine17
- transection16
- transiently16
- translation14
- translatory15
- translocate16
- transparent16
- trapshooter16
- particulate19
- plutocratic22
- pococurante22
- polynuclear23
- procuration19
- punchinello24
- ratatouille14
- reluctantly20
- reluctation17
- protractive21
- phytoalexin27
- phycocyanin28
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