- rhomboidal20
- rhonchal17
- rhythmical23
- rial5
- ribosomal16
- rickettsial19
- rictal10
- ritual8
- rival10
- riyal8
- roentgenological27
- rorqual18
- rostral8
- rotational12
- royal8
- rubrical16
- ruderal10
- rudimental17
- rugal9
- ruminal13
- rural7
- rustical13
- sabbatical20
- saccharoidal22
- sacerdotal15
- sacral10
- sacramental19
- sacrificial21
- sagittal11
- sahiwal13
- sal4
- salal7
- saltatorial13
- salutational16
- salvational18
- sandal9
- sarcolemmal22
- sarcosomal17
- sartorial10
- satirical13
- scandal13
- scarlatinal17
- scatological22
- scenical16
- sceptical19
- sceptral15
- schismatical24
- schistosomal21
- sciential14
- scleral12
- sclerotial15
- scribal14
- scriptural18
- scrotal11
- sculptural20
- seal5
- seasonal10
- secobarbital22
- secretarial15
- sectional14
- sectoral12
- sectorial13
- sedimentological28
- segetal10
- segmental16
- seigneurial16
- seignorial14
- seismal11
- seismological23
- selenological22
- selfheal15
- semantical18
- semasiological24
- semestral13
- semestrial14
- semiannual17
- semiarboreal19
- semiautobiographical38
- semicentennial24
- semiclassical24
- semicolonial21
- semicommercial30
- semicylindrical30
- semidiurnal18
- semiempirical26
- semifeudal19
- semifinal17
- semiformal20
- semifunctional27
- semigovernmental31
- semilethal17
- semimetal16
- semimystical24
- seminal12
- seminatural17
- semiofficial25
- semiological22
- semipolitical24
- semipostal17
- semiprofessional27
- semirural14
- semiterrestrial19
- semitonal14
- semitropical22
- sempiternal19
- senatorial12
- sendal9
- seneschal16
- sensational14
- sensorial11
- sensorineural17
- sensual10
- sentential13
- sentimental17
- sepal9
- septal10
- septennial16
- septentrional19
- septical15
- septicidal18
- sepulchral21
- sequential22
- seral6
- serial7
- sericultural19
- serological18
- serosal8
- serotinal11
- serumal12
- serval11
- sesquicentennial33
- sessional11
- setal6
- several12
- sexagesimal24
- sexual15
- sheal8
- shoal8
- shogunal15
- shrieval15
- sial5
- sidereal10
- sigmoidal16
- signal10
- silvical17
- silvicultural25
- simoniacal18
- simplicial21
- sincipital18
- sinistral11
- sinoatrial12
- sinological19
- sinusoidal14
- siphonal15
- sisal6
- situational14
- skeletal14
- skeptical20
- skoal10
- social10
- societal12
- sociobiological28
- sociocultural23
- sociohistorical24
- sociological22
- sociopolitical25
- sociopsychological38
- sociosexual23
- sodomitical19
- solenoidal14
- solstitial12
- somatological23
- somedeal13
- somital11
- sonantal11
- sophistical20
- sororal8
- soteriological21
- spacial14
- spathal13
- spatial11
- spatiotemporal24
- special14
- speciational20
- spectatorial19
- spectral15
- spectrophotometrical38
- speleological24
- spermatial17
- spermatogonial24
- spermatozoal28
- spermicidal22
- sphenoidal18
- spheral13
- spherical18
- spheroidal17
- spinal11
- spiral10
- spiritual14
- spirochetal20