Which feature distinguishes muwāzanah from sajʿ?

Comprehensive Review and Application: Bayān, Badīʿ and the Final Rhetorical Arts

• Muwāzanah always uses a blocking clue
• Muwāzanah borrows only meanings
• Muwāzanah requires pattern agreement but not rhyme
• Every word in muwāzanah must be an antonym