arils rails airls iarls rials irals arlis ralis alris laris rlais lrais ailrs ialrs alirs lairs ilars liars rilas irlas rlias lrias ilras liras arisl raisl airsl iarsl riasl irasl arsil rasil asril saril rsail srail aisrl iasrl asirl sairl isarl siarl risal irsal rsial srial isral siral arlsi ralsi alrsi larsi rlasi lrasi arsli rasli asrli sarli rsali srali alsri lasri aslri salri lsari slari rlsai lrsai rslai srlai lsrai slrai ailsr ialsr alisr laisr ilasr liasr aislr iaslr asilr sailr isalr sialr alsir lasir aslir salir lsair slair ilsar lisar islar silar lsiar sliar rilsa irlsa rlisa lrisa ilrsa lirsa risla irsla rsila srila isrla sirla rlsia lrsia rslia srlia lsria slria ilsra lisra islra silra lsira slira
Note: these 'words' (valid or invalid) are all the permutations of the word arils. These words are obtained by scrambling the letters in arils.