spake psake sapke aspke paske apske spkae pskae skpae kspae pksae kpsae sakpe askpe skape ksape akspe kaspe pakse apkse pkase kpase akpse kapse spaek psaek sapek aspek pasek apsek speak pseak sepak espak pesak epsak saepk asepk seapk esapk aespk easpk paesk apesk peask epask aepsk eapsk spkea pskea skpea kspea pksea kpsea speka pseka sepka espka peska epska skepa ksepa sekpa eskpa kespa ekspa pkesa kpesa peksa epksa kepsa ekpsa sakep askep skaep ksaep aksep kasep saekp asekp seakp esakp aeskp easkp skeap kseap sekap eskap kesap eksap akesp kaesp aeksp eaksp keasp ekasp pakes apkes pkaes kpaes akpes kapes paeks apeks peaks epaks aepks eapks pkeas kpeas pekas epkas kepas ekpas akeps kaeps aekps eakps keaps ekaps
Note: these 'words' (valid or invalid) are all the permutations of the word spake. These words are obtained by scrambling the letters in spake.