Letters that make countermeasure
s, a, o, e, n, c, m, r, t, u are letters that make 'countermeasure'
Words within countermeasure
ER, term, re, te, EAS, NT, UN, Ea, sure, counter, as, measure, count, Ur, Asur, Sur, AS, CO, ME, Re, As, Co, Er, Te are words within 'countermeasure'