gnash ngash gansh agnsh nagsh angsh gnsah ngsah gsnah sgnah nsgah sngah gasnh agsnh gsanh sganh asgnh sagnh nasgh ansgh nsagh snagh asngh sangh gnahs ngahs ganhs agnhs naghs anghs gnhas nghas ghnas hgnas nhgas hngas gahns aghns ghans hgans ahgns hagns nahgs anhgs nhags hnags ahngs hangs gnsha ngsha gsnha sgnha nsgha sngha gnhsa nghsa ghnsa hgnsa nhgsa hngsa gshna sghna ghsna hgsna shgna hsgna nshga snhga nhsga hnsga shnga hsnga gashn agshn gsahn sgahn asghn saghn gahsn aghsn ghasn hgasn ahgsn hagsn gshan sghan ghsan hgsan shgan hsgan ashgn sahgn ahsgn hasgn shagn hsagn nashg anshg nsahg snahg asnhg sanhg nahsg anhsg nhasg hnasg ahnsg hansg nshag snhag nhsag hnsag shnag hsnag ashng sahng ahsng hasng shang hsang
Note: these 'words' (valid or invalid) are all the permutations of the word gnash. These words are obtained by scrambling the letters in gnash.