saith asith siath isath aisth iasth satih astih staih tsaih atsih tasih sitah istah stiah tsiah itsah tisah aitsh iatsh atish taish itash tiash saiht asiht siaht isaht aisht iasht sahit ashit shait hsait ahsit hasit sihat ishat shiat hsiat ihsat hisat aihst iahst ahist haist ihast hiast sathi asthi stahi tsahi atshi tashi sahti ashti shati hsati ahsti hasti sthai tshai shtai hstai thsai htsai athsi tahsi ahtsi hatsi thasi htasi sitha istha stiha tsiha itsha tisha sihta ishta shita hsita ihsta hista sthia tshia shtia hstia thsia htsia ithsa tihsa ihtsa hitsa thisa htisa aiths iaths atihs taihs itahs tiahs aihts iahts ahits haits ihats hiats athis tahis ahtis hatis thais htais ithas tihas ihtas hitas thias htias
Note: these 'words' (valid or invalid) are all the permutations of the word saith. These words are obtained by scrambling the letters in saith.