Compounds of 衍

• 布衍
  (n,vs) expatiation
  amplification (upon)
  elaboration
• 敷衍
  (n,vs) expatiation
  amplification (upon)
  elaboration
• 衍字
  (n) (inadvertent) insertion of a character in a text
• 衍文
  (n) (inadvertent) redundancy in a text