Letters that make concurrent operation
a, o, e, n, p, c, r, t, i, u are letters that make 'concurrent operation'
Words within concurrent operation
ER, opera, Opera, pe, re, ti, ERA, cur, NT, ration, at, en, ratio, current, on, concurrent, con, rent, operation, rat, RA, Ur, CO, NC, Io, ion, Ra, Re, At, Co, Cu, Er, Ti, era, concur are words within 'concurrent operation'