wreak rweak werak ewrak rewak erwak wraek rwaek warek awrek rawek arwek weark ewark waerk awerk eawrk aewrk reawk erawk raewk arewk earwk aerwk wreka rweka werka ewrka rewka erwka wrkea rwkea wkrea kwrea rkwea krwea wekra ewkra wkera kwera ekwra kewra rekwa erkwa rkewa krewa ekrwa kerwa wrake rwake warke awrke rawke arwke wrkae rwkae wkrae kwrae rkwae krwae wakre awkre wkare kware akwre kawre rakwe arkwe rkawe krawe akrwe karwe weakr ewakr waekr awekr eawkr aewkr wekar ewkar wkear kwear ekwar kewar waker awker wkaer kwaer akwer kawer eakwr aekwr ekawr keawr akewr kaewr reakw erakw raekw arekw earkw aerkw rekaw erkaw rkeaw kreaw ekraw keraw rakew arkew rkaew kraew akrew karew eakrw aekrw ekarw kearw akerw kaerw
Note: these 'words' (valid or invalid) are all the permutations of the word wreak. These words are obtained by scrambling the letters in wreak.