12. amend&emend 
  amended (to alter or add to something) “订正,改正”,“修正(议案等)”。an amended bill 修正案;amend one's ways 改过自新。  
  emend (to correct errors in) “校订”。emend the text of a book 校勘某书;He emended the typescript before sending it to the printers. 在交付印刷之前他校正文稿。
    
  13. amicable&amiable 
  这两个词都是指“友好的”意思。  
  amicable “友好的,亲切的”指行为或情景。The discussions were amicable, though business like. 讨论虽然是商业形式,但是友好的。  
  amiable “可爱的,和蔼可亲的”Many people are afraid of him, though I found him to be perfectly amiable. 虽然我发现他特别和蔼可亲,但还是有很多人害怕他。
    
  14. assent&ascent   
  assent可用作“agreement”“同意”或“agree”“同意”。   
  ascent n. “上升,晋升”,the ascent of mountain 登山。
    
  15. avert&avoid  
  avert “防止,避免”。   
  avoid “回避,逃避”。avoid bad company 避免和坏人来往;I cannot avoid seeing him. 我不能不见他。
    
  16. besides&beside   
  besides 意思是“in addition to”“加之,还有,另外”;而beside“在……旁边”,“在……一侧”。Duncan is the tall man standing beside my father. 站在我爸爸旁边的高个子男子是邓肯。
    
  17. coherence&cohesion   
  coherence “统一,一致性”;cohesion “结合力,团结”。the cohesion of molecules 分子的结合力。
    
  18. compare with&compare to  
  compare with “和……比起来”   
  compare to “好比”。He compared the moon to a silver plate. 他把月亮比成一个大银盘。
    
  19. impel&compel   
  impel “推动,驱使,激励”。impel sb. to do sth. 激励某人做某事;
  compel “强迫,胁迫,迫使”。compel sb. to one's will 强迫人服从自己。
    
  20. complement&compliment  
  complement “补足(物),补全”,“补足语”。   
  compliment “恭维话,赞辞,敬意”;Your presence is a great compliment. 承蒙光临,不胜荣幸。