1. abandon >> ad hoc
 2. adjacent >> ambiguous
 3. ambition >> artificial
 4. ascribe >> bent
 5. besiege >> call for
 6. call off >> communicable
 7. compatible >> contract
 8. contrary >> defuse
 9. deity >> disdain
 10. dismay >> efface
 11. elaborate >> eradicate
 12. erode >> feeble
 13. feign >> furthermore
 14. furtive >> ground
 15. growth >> hold
 16. hold back >> impose
 17. impotent >> inordinate
 18. inscribe >> leave over
 19. lenient >> make up
 20. make up for >> mortify
 21. mournful >> orient
 22. originate >> phase
 23. phenomenal >> provisional
 24. provoke >> residual
 25. resolute >> sentence
 26. serious >> substantial
 27. succeed >> thwart
 28. timidity >> underscore
 29. unearth >> viable
 30. vigilant >> zero in on