9 letters
- nondoctor15
- nongrowth18
- nonporous15
- nonprofit17
- noontides12
- northings15
- northland15
- notations11
- notochord16
- notorious11
- novations15
- odographs17
- odontoids12
- oesophagi16
- ondograms16
- onrushing16
- oompahing20
- operating15
- operation13
- ophidians16
- optionals14
- optioning16
- orangiest12
- oratorios9
- ordaining14
- ordinands13
- ordinates11
- organdies13
- organised13
- organists12
- orphaning18
- orthicons15
- outdaring14
- ozonating22
- ozonation20
- paintings16
- pandering17
- pangolins17
- pantheons16
- paranoids14
- parathion15
- pardoning17
- parenting16
- parodists13
- parodying18
- parotoids13
- parroting15
- pastoring15
- pasturing16
- pathogens17
- patronise13
- pentagons16
- perianths15
- phonating18
- phonation16
- phonogram20
- phoronids16
- photogram19
- photonics18
- photopias17
- phrasings17
- picaroons16
- pinkroots17
- pintadoes14
- plainsong17
- plantings17
- pliotrons14
- pogromist17
- poisoning16
- poltroons14
- pondering17
- ponderosa14
- poortiths14
- portaging17
- portioned14
- positrons13
- postgrads15
- posturing16
- potations13
- pothering17
- potshards15
- predating16
- predation14
- prenotion14
- printhead16
- printings16
- prisoning16
- probating18
- probation16
- prodigals16
- profaning19
- progestin15
- prognosed16
- prognosis15
- promoting18
- promotion16
- pronating16
- pronation14
- pronators13
- pronghorn18
- proponing19
- proposing18
- prorating15
- proration13
- prosodist13
- prostomia15
- protamins16
- protistan13
- protopods16
- protoxids20
- protozoan22
- purgation16
- raindrops14
- rainspout14
- ransoming16
- rationing13
- ratooning13
- reanoints11
- reasoning13
- repasting15
- reshaping17
- respading16
- rhapsodic18
- rhizopods24
- rhodamins16
- rhodonite13
- rhodopsin16
- rigadoons13
- rigatonis12
- rigaudons14
- riposting15
- rogations12
- rootholds13
- rotations10
- sainthood13
- sangfroid16
- sapogenin16
- satinpods14
- satinwood14
- scarphing20
- scrooping18
- senhorita12
- serotonin11
- shadowing18
- shipboard18
- shootings14
- shorthand15
- shrouding16
- signatory14
- signboard16
- signorina13
- siphoning18
- smoothing17
- snatching18
- sociopath17
- sonorants11
- soothsaid12
- sopranino14
- sorptions13
- sphenodon17
- spoliator13
- spontoons14
- sporangia15
- sporogony17
- sporozoan22
- spraining16
- spreading16
- springald17
- sprinting16
- sprouting16
- staghound16
- stanching18
- stanchion16
- standings14
- starching17
- stinkhorn17
- stounding15
- straining13
- stranding14
- straphang17
- straphung18
- strapping18
- strongish14
- strongman16
- stropping18
- strouding14
- supinator14
- syphoning20
- tamponing19
- tandooris11
- tarnished13
- therapsid15
- theropods15
- thindowns17
- thrashing16
- threading15
- threaping17
- throating14
- thronging17
- tonsorial11