Letters that make reciprocative
a, o, e, p, c, r, t, i, v are letters that make 'reciprocative'
Words within reciprocative
Cipro, IP, re, ti, PR, EC, oca, Ci, at, Ro, pro, iv, ci, cat, CAT, IV, CA, roc, Re, At, Ca, Pr, Ti are words within 'reciprocative'