heard ehard haerd aherd eahrd aehrd herad ehrad hread rhead erhad rehad hared ahred hraed rhaed arhed rahed earhd aerhd erahd reahd arehd raehd headr ehadr haedr ahedr eahdr aehdr hedar ehdar hdear dhear edhar dehar hader ahder hdaer dhaer adher daher eadhr aedhr edahr deahr adehr daehr herda ehrda hreda rheda erhda rehda hedra ehdra hdera dhera edhra dehra hrdea rhdea hdrea dhrea rdhea drhea erdha redha edrha derha rdeha dreha harde ahrde hrade rhade arhde rahde hadre ahdre hdare dhare adhre dahre hrdae rhdae hdrae dhrae rdhae drhae ardhe radhe adrhe darhe rdahe drahe eardh aerdh eradh readh aredh raedh eadrh aedrh edarh dearh aderh daerh erdah redah edrah derah rdeah dreah ardeh radeh adreh dareh rdaeh draeh
Note: these 'words' (valid or invalid) are all the permutations of the word heard. These words are obtained by scrambling the letters in heard.