Letters that make covert operation
a, o, e, n, p, c, r, t, i, v are letters that make 'covert operation'
Words within covert operation
ER, opera, Opera, pe, ti, ERA, OV, ration, at, ratio, cover, on, overt, covert, over, operation, overt operation, rat, RA, CO, cove, Io, ion, Ra, At, Co, Er, Ti, ERT, era are words within 'covert operation'