FILUSTM
Make words with M
Never: plural or third-person -S
FILM FILUM ILIUM LIMIT LITMUS MIFF MILIUM MILL MILT MISFIT MISLIST MISS MISSIS MIST MISTFUL MISTUS MITT MUFF MUFTI MULL MUSLIM MUSS MUST MUTISM MUTT SLIM SLUM SMUT STIM STIMULUS STUM SUMMIST SUMMIT TUMULT TUMULUS
Pangrams: MISTFUL
score: 134