1, concerntration

2, composer, composition

3, consideration

4, construction

5, coordination

6, depression

7, donation, donator

8, erection

9,foundation

10, location

11, application

12, generation 

13, obligation

14, reflection

16, organization

17,comparation
18,  attendance
19, recognition

20, animation

21, consumption
22, explosion

23, discussion

24, celebration

25, education
26,commemoration
27, invader, invasion

28, preservation

29, recommendation

1, concentrate – concentration

2, compose – composition, composer

3, consider – consideration

4, construct – construction

5, coordinate – coordination

6, depress – depression

7, donate – donation; donator

8, erect – erection

9, found – foundation

10, locate – location

11, apply – application; applicant

12, generate – generation; generator

13, oblige – obligation

14, reflect – reflection

16, organize – organization

17, compare – comparation

18, attend – attendance; attendee

19, recognize – recognition

20, animate – animation

21, consume – consumption; consumer

22, explode – explosion

23, discuss – discussion

24, celebrate – celebration

25, educate – education; educator

26, commemorate – commemoration

27, invade – invasion; invader

28, preserve – preservation; preservative

29, recommend - recommendation