13 letters
- reimbursement24
- relatednesses16
- relaxednesses23
- remorselessly20
- repletenesses18
- reposefulness22
- repossessions17
- representable21
- resectability22
- resegregating20
- resegregation18
- resensitizing26
- resentfulness20
- resettlements18
- ressentiments18
- restfulnesses19
- restivenesses18
- retirednesses15
- revolutionise20
- rhabdoviruses24
- ribonucleases22
- riotousnesses15
- roguishnesses19
- roundednesses18
- ruinousnesses17
- ruthfulnesses22
- ruttishnesses17
- saintlinesses16
- salmonelloses20
- salpingitises20
- saplessnesses18
- sarcophaguses24
- scrappinesses23
- scrawninesses21
- scruffinesses24
- seasicknesses21
- seasonalities15
- seaworthiness19
- secessionisms20
- secessionists17
- seclusiveness23
- secobarbitals23
- secondariness19
- secretagogues21
- secretaryship23
- secretiveness21
- sectarianisms20
- sectarianized27
- sectarianizes26
- sectionalisms21
- sedimentation19
- sedimentology23
- seditiousness16
- seductiveness23
- segmentations20
- seismographer23
- seismographic26
- seismological23
- seismologists19
- seismometries19
- selectionists18
- selectiveness22
- selectivities21
- selenocentric22
- selenological22
- selenologists18
- selfishnesses20
- semasiologies19
- semiaridities17
- semiautomatic23
- semicivilized34
- semiclassical24
- semiconductor25
- semiconscious24
- semidiameters20
- semiempirical26
- semievergreen23
- semifinalists21
- semilegendary23
- semiliterates17
- semimonthlies23
- semiparasites19
- semiparasitic22
- semipermanent24
- semipermeable26
- semipolitical24
- semiporcelain24
- semireligious20
- semisedentary20
- semisynthetic24
- semitonically24
- sempiternally24
- sensationally19
- senselessness16
- sensibilities18
- sensitisation15
- sensitiveness19
- sensitivities18
- sensitization24
- sensitometers17
- sensitometric20
- sensorineural17
- sententiously19
- sentimentally22
- separableness21
- separationist17
- septentrional19
- sequestrating26
- sequestration24
- serendipities18
- serendipitous19
- serialization24
- sericulturist19
- seriousnesses15
- serodiagnoses17
- serodiagnosis17
- serologically23
- serpiginously23
- serriednesses15
- servilenesses19
- sesquiterpene27
- sexagenarians24
- sexdecillions27
- sexlessnesses22
- sexploitation25
- sextuplicated29
- sextuplicates28
- sexualization32
- shadowinesses20
- shallownesses21
- shapelinesses20
- shepherdesses21
- sickishnesses23
- sightlinesses19
- silverinesses19
- sincerenesses18
- sinlessnesses16
- sinuousnesses17
- sizablenesses27
- sketchinesses23
- slavishnesses21
- slendernesses17
- slouchinesses21
- somatosensory19
- songfulnesses22
- sottishnesses16
- soulfulnesses21
- specialnesses21
- spiegeleisens20
- spirochetoses21
- splashinesses20
- spondylitises21
- springinesses20
- squalidnesses26
- squashinesses26
- squishinesses26
- starchinesses19
- statelinesses15
- staunchnesses21
- steeplechaser22
- steeplechases22
- stegosauruses17
- stephanotises19
- stiltednesses16
- strangenesses17
- streakinesses18
- streptokinase21
- stringcourses20
- stringinesses17
- studiednesses17
- stuntednesses17
- stylishnesses19
- suasivenesses19
- subacidnesses22
- subassemblies24
- subjectivised34
- subjectivises33
- sublimenesses22
- subserviences25
- subserviently25
- subtilenesses19
- supersensible22
- supersessions18
- supremenesses21
- suspensefully26
- swarthinesses19
- swinishnesses20
- switchgrasses23
- tactfulnesses22
- tearfulnesses19
- tediousnesses16
- teemingnesses20
- telegrapheses21
- tenablenesses19
- tenuousnesses17
- teratogeneses16
- tessellations16
- thermosetting21
- thirstinesses16
- threadinesses17