2.15

1,accomplishment,something that is successful.

2,acronym,abbreviation,first letters,some words./ˈæk.rə.nɪm/.

3,adhere,to stick firmly.

4,aggression,/əˈɡreʃ.ən/,attack no matter spiritual or physical.

5,awareness,knowledge of mang things.

6,balance,neutral.[ˈnuːtrəl]

7,careless.casual,not showing enough attention.

or relaxed.

8,chimpanzee,/ˌtʃɪm.pænˈziː/,a kind of huge ,black ,intelligent monkey.

9,collective,shared by every member of  a  group.

10,conductivity,degree that allow heat or electricity through something.

11,congestion,a place which too crowded.

or like jams.

12,council,美[ˈkaʊnsl],some people voted to make decisions.

13,crevice, /ˈkrev.ɪs/,long ,narrow crack in the surface of rock.

14,curriculum,the subjects you need  to study.

15,debate,dɪˈbeɪt,serious discussion.

16,deficiency,lack of.

17,devotion,love or care for someone or something.

or 

religious worship .....

18,discharge ,to allow someone officially leave somewhere.

19,dispute,like debate ,quarrel.

20,