linac ilnac lniac nliac inlac nilac lianc ilanc lainc alinc ialnc ailnc lnaic nlaic lanic alnic nalic anlic inalc nialc ianlc ainlc nailc anilc linca ilnca lnica nlica inlca nilca licna ilcna lcina clina iclna cilna lncia nlcia lcnia clnia nclia cnlia incla nicla icnla cinla ncila cnila liacn ilacn laicn alicn ialcn ailcn lican ilcan lcian clian iclan cilan lacin alcin lcain clain aclin calin iacln aicln icaln cialn aciln cailn lnaci nlaci lanci alnci nalci anlci lncai nlcai lcnai clnai nclai cnlai lacni alcni lcani clani aclni calni nacli ancli ncali cnali acnli canli inacl niacl iancl aincl naicl anicl incal nical icnal cinal ncial cnial iacnl aicnl icanl cianl acinl cainl nacil ancil ncail cnail acnil canil
Note: these 'words' (valid or invalid) are all the permutations of the word linac. These words are obtained by scrambling the letters in linac.