aches cahes ahces haces chaes hcaes acehs caehs aechs eachs ceahs ecahs ahecs haecs aehcs eahcs heacs ehacs cheas hceas cehas echas hecas ehcas achse cahse ahcse hacse chase hcase acshe cashe asche sache csahe scahe ahsce hasce ashce sahce hsace shace chsae hcsae cshae schae hscae shcae acesh caesh aecsh eacsh ceash ecash acseh caseh asceh saceh csaeh scaeh aesch easch asech saech esach seach cesah ecsah cseah sceah escah secah ahesc haesc aehsc eahsc heasc ehasc ahsec hasec ashec sahec hsaec shaec aeshc eashc asehc saehc esahc seahc hesac ehsac hseac sheac eshac sehac chesa hcesa cehsa echsa hecsa ehcsa chsea hcsea cshea schea hscea shcea cesha ecsha cseha sceha escha secha hesca ehsca hseca sheca eshca sehca
Note: these 'words' (valid or invalid) are all the permutations of the word aches. These words are obtained by scrambling the letters in aches.