- sanguineous17
- sanious9
- sapajous21
- saphenous16
- saponaceous19
- saporous12
- saprophagous23
- sarcomatous18
- sarcophagus22
- sarcous11
- sardius9
- sartorius10
- savorous13
- saxicolous22
- scabious15
- scabrous15
- scalenus14
- scandalous17
- scarabaeus17
- scarious12
- schizogonous30
- scirrhous15
- scirrhus14
- sclerenchymatous32
- sclerous13
- scoriaceous18
- scrofulous19
- scrumptious22
- scrupulous20
- scurrilous16
- scyphus18
- sebaceous16
- seditious11
- sedulous12
- seleniferous18
- selenous11
- semiautonomous23
- semiconscious24
- semilustrous18
- seminiferous20
- semiprecious22
- semireligious20
- senarius10
- sensuous11
- sententious14
- sepalous13
- seppukus20
- septenarius16
- sequacious24
- serendipitous19
- sericeous13
- serious8
- serotinous12
- serous7
- serpiginous18
- setaceous13
- setous7
- setulous11
- sextarius17
- shamus12
- shiatsus11
- shiatzus20
- shoyus11
- silenus10
- siliceous14
- silicious14
- simious11
- simultaneous19
- sinistrous12
- sinuous10
- sinus7
- situs6
- slanderous14
- slaughterous19
- slumberous19
- slumbrous18
- snafus11
- socioreligious21
- solanaceous17
- soleus8
- solicitous15
- solidus10
- solus7
- sombrous15
- somniferous19
- sonorous10
- soporiferous19
- sorcerous13
- sorus6
- sous5
- spacious15
- specious15
- spermous15
- sphagnous18
- sphygmus21
- spinous12
- spiritous13
- spirituous15
- splendiferous23
- splendorous18
- splendrous17
- splenius14
- spontaneous17
- sporogenous18
- spumous15
- spurious13
- squamous22
- stannous11
- staphylococcus32
- status7
- steatopygous20
- stegosaurus15
- stercoraceous20
- stertorous11
- stimulus14
- stoloniferous19
- strabismus17
- stratocumulus23
- stratous9
- stratus8
- strenuous12
- streptobacillus27
- streptococcus26
- stridulous14
- strobilus14
- strumous13
- struthious14
- studious11
- stupendous17
- stuporous14
- stylus10
- subaqueous25
- subbituminous26
- subconscious24
- subcoriaceous24
- subcutaneous22
- suberous13
- subgenus16
- submenus17
- subreptitious21
- subterraneous19
- succedaneous22
- succubus20
- sudoriferous18
- sulcus12
- sulfurous16
- sulphureous20
- sulphurous19
- sulus8
- sumptuous18
- superambitious25
- supercautious22
- supercilious21
- superfluous21
- superluxurious29
- superstitious18
- suppositious20
- supposititious22
- surplus13
- surreptitious18
- suspicious18
- susurrous12
- susurrus11
- syllabus16
- sympetalous21
- symphonious23
- syncarpous20
- synchronous21
- synonymous20
- tableaus13
- tabus9
- talcous12
- talus7
- tamandus14
- tamaraus12
- tantalus11
- tarsometatarsus19
- tarsus7
- taus5
- tautologous16
- taxus13
- tedious9
- teledus10
- temerarious15
- tempestuous19
- tenacious14
- tendencious18
- tendentious15
- tendinous13
- tendrilous14
- tenebrious15
- tenebrous14
- tenesmus13
- tenuous10
- terminus13
- terraqueous22
- terricolous16
- terrigenous15
- testaceous14
- tetanus9