The opposite of “innocent:” accusation, guilt, harm, illegality, impurity, sin, uncleanness.
The opposite of “cynical:” believing, non-skeptical, unsuspicious.
(I had difficulty understanding if you meant the opposite of innocent OR cynical.)
Thanks to “The New Roget’s Thesaurus,” copyright 1961, by G. P. Putnam’s Sons, Inc.(The Roget Dictionary copyright 1931, 1936 by C. O. Sylvester Mawson. All rights reserved)
Printed by Berkley Medallion Books, Berkley Publishing Corp., 200 Madison Ave., New York, New York 10016 Berkley Medallion Book (trade mark) 757,375, Jan. 1977.