shoal hsoal sohal oshal hosal ohsal shaol hsaol sahol ashol hasol ahsol soahl osahl saohl asohl oashl aoshl hoasl ohasl haosl ahosl oahsl aohsl shola hsola sohla oshla hosla ohsla shloa hsloa slhoa lshoa hlsoa lhsoa solha oslha sloha lsoha olsha losha holsa ohlsa hlosa lhosa olhsa lohsa shalo hsalo sahlo ashlo haslo ahslo shlao hslao slhao lshao hlsao lhsao salho aslho slaho lsaho alsho lasho halso ahlso hlaso lhaso alhso lahso soalh osalh saolh asolh oaslh aoslh solah oslah sloah lsoah olsah losah saloh asloh slaoh lsaoh alsoh lasoh oalsh aolsh olash loash alosh laosh hoals ohals haols ahols oahls aohls holas ohlas hloas lhoas olhas lohas halos ahlos hlaos lhaos alhos lahos oalhs aolhs olahs loahs alohs laohs
Note: these 'words' (valid or invalid) are all the permutations of the word shoal. These words are obtained by scrambling the letters in shoal.