这是扩大词汇量的一种极有效的方法，可以从意思，或者词性上进行扩展。
1.compliment=acclaim=praise=applaud
2.monitor=watch=obsereve
3. social status=rank=class=position= social scale
4、person=people=sociality
5.informal=infomality=casual=casuality
6.loss=lack=absence=missing
7.change=exchange=replacement=substitution
8.economic=financial
9.correlation=relationship=relation=link=connection=association=tie=correspondence
10.trend=change=development=advancement
11.recession=depression=fluctuation
12,diffuse=spread
13.companion=friend=colleague=fellow=counterpart