11 letters
- quintillion25
- ratatouille14
- rationalise13
- rationalism16
- rationalist13
- rationality15
- reanimation16
- retaliation13
- ritualistic16
- romanticist18
- ruminations17
- rustication16
- saltatorial13
- salutations14
- sanatoriums16
- sanitariums16
- sanitations13
- sanitoriums16
- saturations13
- saturnalian15
- scintillant18
- seminatural17
- sillimanite17
- simulations17
- situational14
- staurolitic16
- stimulating19
- stimulation17
- stimulators16
- stimulatory18
- stipulation17
- sublimation20
- sublittoral17
- subnational18
- subrational17
- summational20
- tabulations17
- tantalising16
- termination16
- testimonial16
- titillation14
- tonsillitis14
- tortellinis14
- tourmalines17
- tournaments17
- traditional14
- tramontanes16
- transaction16
- transhumant19
- transitions13
- translating16
- translation14
- transmittal16
- transmuting19
- tribulation17
- trillionths16
- trinitarian13
- truncations17
- unanimities17
- unbrilliant19
- unimportant20
- uninitiates14
- unitization23
- unstartling17
- urtications16
- utilitarian14
- utilization23
- voluntarism21
- voluntarist18