waste awste wsate swate aswte sawte watse awtse wtase twase atwse tawse wstae swtae wtsae twsae stwae tswae astwe satwe atswe taswe stawe tsawe waset awset wsaet swaet aswet sawet waest awest weast ewast aewst eawst wseat sweat wesat ewsat sewat eswat asewt saewt aeswt easwt seawt esawt wates awtes wtaes twaes atwes tawes waets awets weats ewats aewts eawts wteas tweas wetas ewtas tewas etwas atews taews aetws eatws teaws etaws wstea swtea wtsea twsea stwea tswea wseta sweta westa ewsta sewta eswta wtesa twesa wetsa ewtsa tewsa etwsa stewa tsewa setwa estwa teswa etswa astew satew atsew tasew staew tsaew asetw saetw aestw eastw seatw esatw atesw taesw aetsw eatsw teasw etasw steaw tseaw setaw estaw tesaw etsaw
Note: these 'words' (valid or invalid) are all the permutations of the word waste. These words are obtained by scrambling the letters in waste.