英语高级单词的疑问

这是我好朋友发给我的，超有用，用了老外都对你刮目相看！
1. important =crucial (extremely important),significant(amount or effect large enough to be important)

2.common=universal, ubiquitous(if something is ubiquitous, it seems to be everywhere)

3.abundant=ample(enough and usually extra), plentiful(enough for people's needs and wants)

4.stick=adhere, cling(hold on something tightly)

5.neglect=ignore.(difference: neglect means someone has not paid enough attention to something; ignore means no attention.)

6.near=adjacent(twothings next to each other), adjoin(the same as adjacent)

7.pursue=woo(man woos woman, old-fashioned), seek(if you seek sth, you try to obtain it. FORMAL)

8.accurate=precise(precise is exact and accurate in all details), exact(correct in every detail)

9.vague=obscure(unknown or known by only a few people)

10.top=peak, summit

11.competitor=rival, opponent(especially i