Letters that make refractory period
a, o, d, e, f, p, c, r, t, i, y are letters that make 'refractory period'
Words within refractory period
ER, OR, OD, Tory, act, pe, period, re, ref, AC, RI, refractory, CT, RA, Rio, Io, tor, Ra, Re, peri, actor, Ac, Er, Fr, refract are words within 'refractory period'