spawn psawn sapwn aspwn paswn apswn spwan pswan swpan wspan pwsan wpsan sawpn aswpn swapn wsapn awspn waspn pawsn apwsn pwasn wpasn awpsn wapsn spanw psanw sapnw aspnw pasnw apsnw spnaw psnaw snpaw nspaw pnsaw npsaw sanpw asnpw snapw nsapw anspw naspw pansw apnsw pnasw npasw anpsw napsw spwna pswna swpna wspna pwsna wpsna spnwa psnwa snpwa nspwa pnswa npswa swnpa wsnpa snwpa nswpa wnspa nwspa pwnsa wpnsa pnwsa npwsa wnpsa nwpsa sawnp aswnp swanp wsanp awsnp wasnp sanwp asnwp snawp nsawp answp naswp swnap wsnap snwap nswap wnsap nwsap awnsp wansp anwsp nawsp wnasp nwasp pawns apwns pwans wpans awpns wapns panws apnws pnaws npaws anpws napws pwnas wpnas pnwas npwas wnpas nwpas awnps wanps anwps nawps wnaps nwaps
Note: these 'words' (valid or invalid) are all the permutations of the word spawn. These words are obtained by scrambling the letters in spawn.