mythological (adj.)

• acknowledged
• allegoric
• conventional
• customary
• established
• fabulous
• fictional
• fictitious
• fictive
• fixed
• hallowed
• heroic
• hoary
• immemorial
• inveterate
• legendary
• long-standing
• make-believe
• mythic
• oral
• parabolic
• prescriptive
• received
• recognized
• romantic
• rooted
• time-honored
• traditional
• true-blue
• understood
• unwritten
• venerable
• worshipful