10 letters
- rapacities16
- rationales12
- recitalist14
- recitation14
- relictions15
- reptilians15
- resonantly15
- rheostatic15
- sanitarily14
- sanitation12
- senatorial12
- senatorian12
- separation14
- sincipital18
- sinoatrial12
- solicitant15
- spatiality16
- speciality19
- speciation17
- sphericity20
- splotchier19
- stationary13
- stationery13
- stentorian12
- strychnine19
- synaloepha19
- synchronal20
- synoptical20
- syphilitic21
- tarnations12
- theatrical16
- theistical16
- thiopental17
- tholeiitic16
- thorianite13
- thylacines19
- tinctorial15
- tonalities12
- tonicities14
- topicality19
- tracheitis15
- tractional15
- transeptal15
- transiency17
- transition12
- transplant16
- tretinoins12
- triathlons14
- tricotines14
- triennials13
- tripinnate15
- triplicate17
- triplicity19
- trisection14
- triticales14
- tyrannical18