13 letters
- roadabilities18
- rudimentarily22
- sailboardings21
- sarsaparillas18
- scintillantly23
- scintillating22
- scintillation20
- scintillators19
- semicivilized34
- semilegendary23
- semiliterates17
- sensibilities18
- servilenesses19
- sexdecillions27
- shipbuildings27
- silhouettists17
- silverberries21
- silverinesses19
- silvicultural25
- silvicultures24
- sinterability20
- snowmobilings27
- snowmobilists24
- sociabilities20
- solderability21
- soliloquising28
- soliloquizers34
- soliloquizing37
- solvabilities22
- sorbabilities20
- spaghettilike25
- spreadability23
- squeezability38
- stabilization27
- sterilization24
- stiltednesses16
- strobilations18
- submillimeter25
- subtilenesses19
- subtilization28
- suitabilities18
- sulfanilamide24
- summabilities24
- superfamilies24
- supermilitant22
- superthriller21
- surveillances24
- survivability28
- tangibilities20
- telefacsimile24
- testabilities17
- thermophilous25
- titillatingly21
- tonsillectomy24
- tonsillitises16
- trailbreakers21
- tranquilities25
- tranquilizers34
- tranquilizing37
- tranquillized36
- tranquillizer35
- tranquillizes35
- tredecillions20
- triliteralism18
- trustworthily22
- ultrafamiliar22
- ultrafiltrate19
- ultramilitant20
- ultravirility22
- umbilications25
- unassimilable23
- unassimilated20
- uncustomarily25
- underutilized28
- underutilizes27
- unfamiliarity24
- unfulfillable29
- unknowability29
- unnecessarily22
- unnilpentiums25
- unnilquadiums32
- unreliability22
- unsociability24
- unsuitability22
- unwillingness24
- unworkability28
- upgradability26
- vacillatingly28
- variabilities21
- vasodilations20
- vaudevillians26
- vendibilities23
- ventriloquial30
- ventriloquies29
- ventriloquism32
- ventriloquist29
- ventriloquize38
- verifiability26
- verisimilarly24
- versatileness19
- versatilities18
- vexillologies29
- vexillologist29
- vigintillions23
- vilifications25
- violabilities22
- volatilizable32
- vulnerability26
- washabilities22
- wearabilities20
- wettabilities20
- whippoorwills29
- willfulnesses24
- willingnesses22
- workabilities24