11 letters
- pontificate21
- portraiture15
- postconcert21
- potentiator15
- potlatching23
- potteringly20
- praelecting21
- pratincoles19
- preachingly25
- preaverring21
- prebiologic23
- precanceled23
- prechecking29
- prechilling24
- precipitant21
- precipitate20
- precleaning22
- preclearing21
- preclinical23
- precocities20
- precolonial20
- preconceive25
- preconcerts21
- precreasing20
- precritical21
- predicating21
- predication19
- predoctoral19
- preelecting21
- preelection19
- preelectric21
- preenacting21
- preerecting20
- prehearings19
- prehistoric19
- prelections19
- prelibation19
- preliterary17
- preliterate15
- preordering18
- preregister16
- prerogative20
- preromantic21
- preschooler20
- preterminal19
- pretraining18
- pretreating17
- princeliest19
- probationer18
- procephalic26
- proclaiming24
- procreating20
- procreation18
- procreative21
- procreators17
- proctologic23
- procuration19
- profiterole18
- progenitors17
- prolegomena21
- proletarian16
- proletariat15
- proliferate18
- prophetical23
- propitiator17
- prorogating19
- prorogation17
- prostrating17
- prostration15
- protagonist17
- protections18
- protectoral18
- proteinuria16
- proteolytic20
- prothoraces19
- prothoracic22
- protocoling21
- protonating18
- protopathic22
- protoplanet19
- protostelic18
- protractile18
- protracting20
- protraction18
- protractive21
- protractors17
- pyrotechnic25
- ratiocinate15
- reaccenting21
- reaccepting23
- reallotting16
- reapportion18
- rearresting14
- reattaching19
- recapturing21
- recarpeting20
- receptacles21
- rechallenge21
- rechartered17
- reciprocals21
- reciprocate20
- reciprocity22
- recirculate19
- recitations15
- recognition18
- recompiling24
- reconcilers19
- reconciling22
- reconnoiter16
- reconnoitre16
- recontacted19
- recordation16
- recreations15
- recriminate18
- rectilinear16
- redecorator15
- redirecting18
- redirection16
- reelections16
- reexploring25
- reexporting24
- referential16
- refiltering18
- reflectance22
- refrigerant17
- refrigerate16
- regathering18
- regenerator14
- regionalist15
- regionalize24
- regrettable17
- reimporting20
- reinoculate17
- reintegrate14
- reinterpret15
- reinterring15
- reiterating14
- reiteration12
- reiterative15
- relegations15
- relettering15
- relocations16
- reluctating19
- reluctation17
- remigration17
- renegotiate14
- renographic22
- reoccurring21
- reoperating17
- reoperation15
- reorganizer23
- reorientate12
- reorienting15
- repartition15
- repatterned16
- repertoires14
- repertories14
- repetitions15
- replacement22
- replenisher18
- replicating21
- replication19
- replicative22
- replicators18
- repolishing20
- reportorial15
- reproachers19
- reproaching22
- reprobating20
- reprobation18
- rerecording18
- rereleasing15
- rerepeating17
- reschooling20
- researching19
- respiration15
- resplitting18
- restitching19
- restoration12
- restricting17
- restriction15
- retailoring15
- retaliating15
- retaliation13
- retargeting16
- retempering20
- rethreading17
- reticencies18
- retightened17
- retinopathy19
- retractions15
- retrenching20
- retroacting17
- retroaction15
- retroactive18
- retroceding18
- retrofiring17
- retrorocket18
- reverential17
- rheological20