unzip nuzip uznip zunip nzuip znuip unizp nuizp uinzp iunzp niuzp inuzp uzinp zuinp uiznp iuznp ziunp izunp nziup zniup nizup inzup zinup iznup unzpi nuzpi uznpi zunpi nzupi znupi unpzi nupzi upnzi punzi npuzi pnuzi uzpni zupni upzni puzni zpuni pzuni nzpui znpui npzui pnzui zpnui pznui unipz nuipz uinpz iunpz niupz inupz unpiz nupiz upniz puniz npuiz pnuiz uipnz iupnz upinz puinz ipunz piunz nipuz inpuz npiuz pniuz ipnuz pinuz uzipn zuipn uizpn iuzpn ziupn izupn uzpin zupin upzin puzin zpuin pzuin uipzn iupzn upizn puizn ipuzn piuzn zipun izpun zpiun pziun ipzun pizun nzipu znipu nizpu inzpu zinpu iznpu nzpiu znpiu npziu pnziu zpniu pzniu nipzu inpzu npizu pnizu ipnzu pinzu zipnu izpnu zpinu pzinu ipznu piznu
Note: these 'words' (valid or invalid) are all the permutations of the word unzip. These words are obtained by scrambling the letters in unzip.