riddle Synonyms

conundrum enigma permeate cryptogram penetrate brain-teaser problem diffuse imbue pervade mystery puzzle interpenetrate question screen rebus brainteaser teaser trephine trepan striate stumper suffuse puzzler transpierce riddling strainer strain screening secrecy secret sieve sifted sift sifter sorter sphinx steganography stickler twister uncipher lacework discolour brattle cut through check off meshwork grillwork speak in tongues whodunit