toils otils tiols itols oitls iotls tolis otlis tlois ltois oltis lotis tilos itlos tlios ltios iltos litos oilts iolts olits loits ilots liots toisl otisl tiosl itosl oitsl iotsl tosil otsil tsoil stoil ostil sotil tisol itsol tsiol stiol istol sitol oistl iostl ositl soitl isotl siotl tolsi otlsi tlosi ltosi oltsi lotsi tosli otsli tsoli stoli ostli sotli tlsoi ltsoi tsloi stloi lstoi sltoi olsti losti oslti solti lsoti sloti tilso itlso tliso ltiso iltso litso tislo itslo tsilo stilo istlo sitlo tlsio ltsio tslio stlio lstio sltio ilsto listo islto silto lsito slito oilst iolst olist loist ilost liost oislt ioslt osilt soilt isolt siolt olsit losit oslit solit lsoit sloit ilsot lisot islot silot lsiot sliot
Note: these 'words' (valid or invalid) are all the permutations of the word toils. These words are obtained by scrambling the letters in toils.