decad edcad dcead cdead ecdad cedad deacd edacd daecd adecd eadcd aedcd dcaed cdaed daced adced caded acded ecadd ceadd eacdd aecdd caedd acedd decda edcda dceda cdeda ecdda cedda dedca eddca ddeca ddeca eddca dedca dcdea cddea ddcea ddcea cddea dcdea ecdda cedda edcda decda cdeda dceda deadc edadc daedc adedc eaddc aeddc dedac eddac ddeac ddeac eddac dedac dadec addec ddaec ddaec addec dadec eaddc aeddc edadc deadc adedc daedc dcade cdade dacde adcde cadde acdde dcdae cddae ddcae ddcae cddae dcdae dadce addce ddace ddace addce dadce cadde acdde cdade dcade adcde dacde ecadd ceadd eacdd aecdd caedd acedd ecdad cedad edcad decad cdead dcead eadcd aedcd edacd deacd adecd daecd caded acded cdaed dcaed adced daced
Note: these 'words' (valid or invalid) are all the permutations of the word decad. These words are obtained by scrambling the letters in decad.