hoast ohast haost ahost oahst aohst hosat ohsat hsoat shoat oshat sohat hasot ahsot hsaot shaot ashot sahot oasht aosht osaht soaht asoht saoht hoats ohats haots ahots oahts aohts hotas ohtas htoas thoas othas tohas hatos ahtos htaos thaos athos tahos oaths aoths otahs toahs atohs taohs hosta ohsta hsota shota oshta sohta hotsa ohtsa htosa thosa othsa tohsa hstoa shtoa htsoa thsoa sthoa tshoa ostha sotha otsha tosha stoha tsoha hasto ahsto hsato shato ashto sahto hatso ahtso htaso thaso athso tahso hstao shtao htsao thsao sthao tshao astho satho atsho tasho staho tsaho oasth aosth osath soath asoth saoth oatsh aotsh otash toash atosh taosh ostah sotah otsah tosah stoah tsoah astoh satoh atsoh tasoh staoh tsaoh
Note: these 'words' (valid or invalid) are all the permutations of the word hoast. These words are obtained by scrambling the letters in hoast.