11 letters
- rationalist13
- recantation16
- recitations15
- reparations15
- repartition15
- repositions15
- resorptions15
- respiration15
- restoration12
- restriction15
- retractions15
- retroaction15
- ripsnorting18
- romanticist18
- rustication16
- rusticators15
- sanitarians13
- sanitations13
- saturations13
- separations15
- solicitants16
- sonications16
- speciations18
- spoliations16
- stagnations15
- standpoints17
- starvations16
- supinations17
- suspiration16
- syncopation21
- syncopators20
- tetrasporic17
- transacting18
- transaction16
- transactors15
- transcripts18
- transection16
- transistors12
- transitions13
- translation14
- translators13
- transparent16
- transpiring18
- transplants17
- transposing18
- transposons16
- transuranic17
- trepanation16
- triceratops17
- trinitarian13
- trisections15
- tristearins12
- truncations17
- unpatriotic19
- urtications16
- vacationist19
- vaticinator19