Letters that make rule of grammar
a, o, e, f, g, l, m, r, u are letters that make 'rule of grammar'
Words within rule of grammar
rule, RAM, mar, grammar, AM, MA, ma, Gram, gramma, ar, mA, gram, mm, ram, RA, AR, Ra, Ram, LE, Am, Ar, Ru, Mar are words within 'rule of grammar'