8 letters
- oblation13
- obligati14
- obtainer12
- ocarinas12
- occipita17
- occulter16
- occupant19
- oceanaut13
- octantal13
- oiticica14
- olibanum17
- oliguria12
- omniarch17
- oncidium17
- optician15
- oracular13
- orbitals12
- orbiting14
- orchitic16
- oribatid12
- oriental10
- origanum15
- original12
- orinasal10
- ornithic14
- osculant14
- ouabains13
- outbrawl16
- outbuild15
- outbuilt14
- outburns14
- outburnt14
- outcavil17
- outcharm17
- outclimb19
- outclomb19
- outcrawl16
- outlearn11
- outliner11
- outmarch17
- outrance13
- outrival14
- palmitin16
- panbroil16
- paranoic15
- patronal13
- piacular16
- picloram18
- platinic16
- platinum17
- platonic16
- plutonic17
- primatal15
- proclaim18
- prolamin16
- protamin15
- publican20
- pulmonic20
- punctual18
- putamina16
- quatrain19
- rabbinic18
- rabietic14
- rachitic16
- radioman13
- raincoat12
- rainouts10
- rambling18
- rambutan16
- ramentum16
- ramulous14
- rational10
- reaction12
- recommit17
- relation10
- reobtain12
- reticula13
- retinula11
- rigatoni11
- ringbolt15
- ringtail12
- rolamite12
- romantic15
- romaunts13
- routeman13
- rubaiyat14
- rubicund18
- rubidium17
- rubrical16
- ructions13
- ructious13
- ruinable14
- rumbaing18
- rumbling19
- ruminant14
- ruminate13
- runabout14
- rustical13
- rutilant11
- saccular16
- sailboat12
- samarium15
- santalic13
- sciatica14
- scimitar14
- sibilant13
- simaruba15
- simoniac15
- simulant14
- solarium13
- solatium13
- staminal13
- strobila12
- strobili12
- sublunar15
- subtilin14
- subtonic16
- subtunic17
- sultanic14
- summital16
- surmount14
- taborine12
- taboring14
- taborins12
- taboulis13
- taciturn13
- tactical15
- tailback19
- tailbone13
- tailcoat12
- tailrace12
- talapoin13
- talisman13
- talmudic17
- tamarind13
- tamarins12
- tamboura15
- tambours15
- tamburas15
- tantalic13
- tantalum14
- tenacula14
- tenurial11
- terminal13
- thalamic17
- thoracal14
- thoracic16
- thrombin17
- timaraus12
- timpanum19
- tinamous13
- tiramisu12
- titanium13
- toluidin12
- tonsilar10
- tornadic13
- trachoma16
- trackman19
- traction12
- tragical14
- trailing12
- trainful14
- trainman13
- tramline13
- tramming17
- tranquil20
- triaxial16
- tribadic15
- tribasic14
- tribunal14
- trichina14
- trifocal15
- trigonal12
- trillion11
- trillium14
- trilobal13
- trimaran12
- trimming17
- trinodal11
- trisomic14
- triticum15
- trochaic16
- trochili14
- troilism12
- tropical15
- troupial13
- truckman20
- tsunamic16
- tubiform18
- tubulins15
- tumbling19
- tumbrils16
- turacous13
- turbinal14
- turbocar15
- turbofan16
- turmoils13
- turnable14
- turncoat13
- turrical13