sowth oswth swoth wsoth owsth wosth sotwh ostwh stowh tsowh otswh toswh swtoh wstoh stwoh tswoh wtsoh twsoh owtsh wotsh otwsh towsh wtosh twosh sowht oswht swoht wsoht owsht wosht sohwt oshwt showt hsowt ohswt hoswt swhot wshot shwot hswot whsot hwsot owhst wohst ohwst howst whost hwost sothw osthw stohw tsohw otshw toshw sohtw oshtw shotw hsotw ohstw hostw sthow tshow shtow hstow thsow htsow othsw tohsw ohtsw hotsw thosw htosw swtho wstho stwho tswho wtsho twsho swhto wshto shwto hswto whsto hwsto sthwo tshwo shtwo hstwo thswo htswo wthso twhso whtso hwtso thwso htwso owths woths otwhs towhs wtohs twohs owhts wohts ohwts howts whots hwots othws tohws ohtws hotws thows htows wthos twhos whtos hwtos thwos htwos
Note: these 'words' (valid or invalid) are all the permutations of the word sowth. These words are obtained by scrambling the letters in sowth.