9 letters
- optimists15
- oralities10
- orangiest12
- oratrices12
- ordinates11
- organises12
- organisms15
- organists12
- orgiastic14
- oribatids13
- orientals11
- orientate10
- originate12
- orinasals11
- ornaments14
- orpiments16
- osmeteria12
- ossifiers12
- ossuaries10
- osteomata12
- ostiaries9
- ostinatos10
- ostracise12
- ostracism15
- ostracize21
- ostriches14
- outcastes13
- outraises10
- outrances14
- outsmarts13
- outstares10
- overcasts16
- oysterman15
- paeanisms16
- paintiest13
- pancettas16
- panoramic19
- paraments16
- paranoics16
- parasites12
- parasitic15
- parecisms18
- parotitis12
- partisans13
- partition13
- pastiness13
- pastorate12
- pastramis15
- pastromis15
- patentors13
- patinates13
- patissier12
- patrician16
- patriotic15
- patristic15
- patroness13
- patronise13
- pearmains16
- pessimist15
- petitions13
- pimientos16
- pinasters13
- piscaries15
- piscators15
- pittances16
- poeticism18
- pointiest13
- portances16
- practises15
- preatomic18
- prebiotic18
- precisian16
- precision16
- primacies18
- prismatic18
- prissiest12
- pristanes13
- probities15
- procaines16
- procambia21
- prosaisms15
- prosaists12
- proscenia16
- prosimian16
- prosiness13
- prostates12
- prostatic15
- protamine16
- protamins16
- protistan13
- psoriases12
- psoriasis12
- psoriatic15
- ptomaines16
- rabbinate16
- rabbinism19
- rabidness14
- racemates15
- racemisms18
- racialism16
- racialist13
- radiances14
- radiation11
- radicates13
- raincoats13
- rainstorm13
- rambutans17
- ransomers13
- raticides13
- rationale11
- rationals11
- ratsbanes13
- raucities13
- reactants13
- reactions13
- realistic13
- reanimate13
- reanoints11
- reascents13
- reassails10
- reassigns12
- reassorts9
- reattacks16
- reattains10
- rebaiting15
- rebaptism18
- rebuttons14
- recasting15
- recession13
- recisions13
- recombine19
- recombing21
- recommits18
- recontact16
- recusants14
- redaction14
- reincites13
- reindicts14
- reinhabit15
- reinstate10
- relations11
- reliction14
- reminisce16
- remission13
- remittals13
- remitting15
- remittors12
- remoisten13
- remotions13
- reobtains13
- reseasons10
- resection13
- resinates10
- resinoids11
- resistant10
- resisting12
- resistors9
- resitting12
- resonants11
- resonates10
- resorcins13
- restating12
- restrains10
- restraint10
- restricts12
- resubmits16
- retasting12
- retinites10
- retinitis10
- retinoids11
- retirants10
- retroacts12
- revisions14
- rhamnoses15
- rhatanies12
- rheostats11
- ribosomes15
- ricinuses14
- rigatonis12
- riskiness14
- ritziness19
- robotisms15
- robustest13
- rockabies19
- rockiness17
- rolamites13
- romancers16
- romanised14
- romanises13
- romanizes22
- romantics16
- roominess13
- rosarians10
- rotatable13
- rotations10
- ruminates14
- rusticate13
- rustiness11
- sabbatics18
- sabotages14