ethal tehal ehtal hetal theal hteal etahl teahl eathl aethl taehl atehl ehatl heatl eahtl aehtl haetl ahetl thael htael tahel athel hatel ahtel ethla tehla ehtla hetla thela htela etlha telha eltha letha tleha lteha ehlta helta elhta lehta hleta lheta thlea htlea tlhea lthea hltea lhtea etalh tealh eatlh aetlh taelh atelh etlah telah eltah letah tleah lteah ealth aelth elath leath aleth laeth taleh atleh tlaeh ltaeh alteh lateh ehalt healt eahlt aehlt haelt ahelt ehlat helat elhat lehat hleat lheat ealht aelht elaht leaht aleht laeht halet ahlet hlaet lhaet alhet lahet thale htale tahle athle hatle ahtle thlae htlae tlhae lthae hltae lhtae talhe atlhe tlahe ltahe althe lathe halte ahlte hlate lhate alhte lahte
Note: these 'words' (valid or invalid) are all the permutations of the word ethal. These words are obtained by scrambling the letters in ethal.