nerds enrds nreds rneds ernds rends nedrs endrs nders dners ednrs denrs nrdes rndes ndres dnres rdnes drnes erdns redns edrns derns rdens drens nersd enrsd nresd rnesd ernsd rensd nesrd ensrd nserd snerd esnrd senrd nrsed rnsed nsred snred rsned srned ersnd resnd esrnd sernd rsend srend nedsr endsr ndesr dnesr ednsr densr nesdr ensdr nsedr snedr esndr sendr ndser dnser nsder snder dsner sdner edsnr desnr esdnr sednr dsenr sdenr nrdse rndse ndrse dnrse rdnse drnse nrsde rnsde nsrde snrde rsnde srnde ndsre dnsre nsdre sndre dsnre sdnre rdsne drsne rsdne srdne dsrne sdrne erdsn redsn edrsn dersn rdesn dresn ersdn resdn esrdn serdn rsedn sredn edsrn desrn esdrn sedrn dsern sdern rdsen drsen rsden srden dsren sdren
Note: these 'words' (valid or invalid) are all the permutations of the word nerds. These words are obtained by scrambling the letters in nerds.