Letters that make strong interaction
s, a, o, e, g, n, c, r, t, i are letters that make 'strong interaction'
Words within strong interaction
ER, act, ti, te, Ron, Tera, ERA, NT, AC, ng, inter, Ro, interact, strong, on, in, action, interaction, CT, RA, IN, Io, ion, Ra, Ac, Er, In, Te, Ti, era are words within 'strong interaction'