11. enjoin / adjoin

  enjoin: to direct or order (someone) to do something; to prevent (someone) from doing something

  adjoin (of a building, room, area of land, etc. ): to be next to or joined with something

  12.abjure / adjure

  abjure: to reject (something) formally

  adjure: to urge or command (someone) to do something

  13.bypass / surpass / impasse / impassive

  bypass: to avoid or ignore (someone or something) especially to get something done quicker

  impasse: a situation in which no progress seems possible

  impassive: not showing emotion

  14.pertinacious / tenacious

  pertinacious: adhering resolutely to an opinion, purpose, or design; stubbornly tenacious

  tenacious: very determined to do something

  15.endanger / engender

  engender: to be the source or cause of something

  16.intellectual /intelligible / intelligent

  intelligible: able to be understood

  17.perquisite / prerequisite

  perquisite: gratuity, tip

  prerequisite: something that you officially must have or do before you can have or do something else

  18.passionate / dispassionate

  dispassionate: not influenced or affected by emotions

  19.precocity / preciosity

  precocity: the phenomenon of a child showing the qualities or abilities of an adult at an unusually early age

  preciosity: fastidious refinement

  20.apprehend / reprehend / comprehend

  apprehend: to notice and understand (something); (of police) to arrest (someone)

  reprehend: the voice disapproval of: censure