secret symbol
- cipherHidden writing system
- codeSymbolic communication system
- emblemRepresentational sign or device
- glyphVisual form of character
- runeAncient Germanic letter
sigil · hidden · clandestine · mysterious · occult · hieroglyph · password · mark · insignia · token · cryptic · esoteric · covert · whisper · shadow · key · decode · ritual
- Greek lifefraternities, fraternity, sorority, sororities, frats
visibility/accessibility
secret symbolofficial insignia
Symbols of formal authority
broadcast signal · billboard · neon sign · public announcement
purpose/function
secret symbolwelcome sign
Display announcing friendly reception
open invitation · public announcement · declaration · proclamation · name tag