Letters that make superinfection
s, o, e, f, n, p, c, r, t, i, u are letters that make 'superinfection'
Words within superinfection
ER, infection, pe, ti, sup, EC, superinfect, RI, super, up, on, in, ECT, CT, Erin, IN, Io, ion, peri, Er, In, Fe, Ti, infect are words within 'superinfection'