Letters that make modal auxiliary verb
a, o, b, d, e, l, m, r, i, u, v, y, x are letters that make 'modal auxiliary verb'
Words within modal auxiliary verb
ER, OD, verb, auxiliary verb, modal auxiliary, DA, liar, ar, dal, AU, XI, mod, auxiliary, xi, il, li, modal, AL, AR, IL, IA, MO, Al, Ar, Er, Au, Li, Mo, Rb, mo are words within 'modal auxiliary verb'