10 letters
- obtainment18
- octameters16
- oftentimes17
- omnipotent18
- omniranges17
- omniscient18
- operations14
- operatives17
- operettist13
- optimizers25
- orangeries13
- ordainment16
- ordinaries12
- orientated12
- orientates11
- orienteers11
- originates13
- ornamented16
- ornateness12
- orneriness12
- ornithines14
- overmaster17
- overpraise17
- overprints18
- overstrain15
- overtrains15
- overtreats14
- palimonies18
- palmettoes17
- panettones15
- pantomimes20
- parameters16
- parentings17
- partitions14
- partnering17
- parturient15
- patientest14
- patination15
- patisserie13
- patriotism16
- patronised15
- patronises14
- patronizes23
- patterning17
- pedantries15
- pedestrian15
- pediatrist14
- pegmatites18
- penalities15
- penetrants15
- penetrates14
- pensionary17
- pensioners15
- penstemons18
- pentameter17
- pentatonic18
- pentstemon18
- peperomias19
- perborates16
- perditions15
- perennates15
- perennials16
- perforates16
- peridotite14
- perimeters16
- perineuria15
- periosteal14
- periosteum17
- peristomes16
- peritoneal15
- peritoneum18
- permafrost19
- permanents18
- permeating19
- permeation17
- permethrin19
- permission17
- permittees16
- permitters16
- permitting19
- perorating16
- peroration14
- persistent14
- personated15
- personates14
- personator14
- pertaining17
- perversion18
- petitioned15
- petitioner14
- phenomenas20
- pigeonites16
- pinsetters14
- pinspotter17
- pioneering17
- pirouettes14
- pistareens14
- planimeter18
- pneumonias19
- podiatries14
- podiatrist14
- poetasters13
- poinsettia14
- polarities14
- portamenti17
- portamento17
- porterages15
- postarrest13
- postmaster16
- postmating19
- potentates14
- potentials15
- potentiate14
- potometers16
- praemunire18
- praenomens18
- praenomina18
- praetorian14
- precentors17
- predations15
- prednisone16
- preeminent18
- preemption20
- preemptors19
- preformats19
- prehension17
- prematures17
- premeiotic19
- premiering19
- premoisten17
- prenotions15
- preordains15
- presenting17
- presentism17
- presentist14
- presetting16
- presorting16
- prestorage15
- pretasting16
- pretension15
- preterites13
- pretermits16
- pretesting16
- pretorians14
- pretrained15
- prettifier16
- prettifies16
- prettiness14
- prevention19
- priestlier14
- printeries14
- printmaker21
- priorities13
- prismatoid17
- privateers17
- privations18
- procreates16
- profiteers16
- prolamines18
- promenader18
- promenades18
- prominence21
- pronations15
- pronatores14
- properties16
- propitiate16
- prorations14
- proseminar17
- prosimians17
- prostatism16
- prostrated14
- prostrates13
- protamines17
- proteinase14
- protensive18
- protestant14
- protesters13
- protesting16
- protistans14
- protonates14
- provitamin21
- psittacine17
- pteridines15
- puritanism18
- pyrometers18
- radiometer14
- rainforest14
- rainstorms14
- ramosities13
- ratemeters13
- reanimates14
- reanointed13
- reappoints17
- reattempts16
- receptions17
- recipients17
- recitation14
- recreation14
- rectorates13
- redemption18