nekda enkda nkeda kneda eknda kenda nedka endka ndeka dneka ednka denka nkdea kndea ndkea dnkea kdnea dknea ekdna kedna edkna dekna kdena dkena nekad enkad nkead knead eknad kenad neakd enakd naekd anekd eankd aenkd nkaed knaed naked anked kaned akned ekand keand eaknd aeknd kaend akend nedak endak ndeak dneak ednak denak neadk enadk naedk anedk eandk aendk ndaek dnaek nadek andek danek adnek edank deank eadnk aednk daenk adenk nkdae kndae ndkae dnkae kdnae dknae nkade knade nakde ankde kande aknde ndake dnake nadke andke danke adnke kdane dkane kadne akdne dakne adkne ekdan kedan edkan dekan kdean dkean ekadn keadn eakdn aekdn kaedn akedn edakn deakn eadkn aedkn daekn adekn kdaen dkaen kaden akden daken adken
Note: these 'words' (valid or invalid) are all the permutations of the word nekda. These words are obtained by scrambling the letters in nekda.