nipas inpas npias pnias ipnas pinas niaps inaps naips anips ianps ainps npais pnais napis anpis panis apnis ipans pians iapns aipns pains apins nipsa inpsa npisa pnisa ipnsa pinsa nispa inspa nsipa snipa isnpa sinpa npsia pnsia nspia snpia psnia spnia ipsna pisna ispna sipna psina spina niasp inasp naisp anisp iansp ainsp nisap insap nsiap sniap isnap sinap nasip ansip nsaip snaip asnip sanip iasnp aisnp isanp sianp asinp sainp npasi pnasi napsi anpsi pansi apnsi npsai pnsai nspai snpai psnai spnai naspi anspi nsapi snapi asnpi sanpi pasni apsni psani spani aspni sapni ipasn piasn iapsn aipsn paisn apisn ipsan pisan ispan sipan psian spian iaspn aispn isapn siapn asipn saipn pasin apsin psain spain aspin sapin
Note: these 'words' (valid or invalid) are all the permutations of the word nipas. These words are obtained by scrambling the letters in nipas.