1. Construct to build, to put together piece by piece: Builders construct buildings.

2. Construction the act of building: That house has been under construction for two months now.

3. Connect to attach, join together: I connected the TV antenna to the TV.

4. Connection an attachment, a joining together: I fixed the loose connection between the TV antenna and the TV.

5. Combine to join together: Rain and freezing temperatures combine to make snow.

6. Combination two or more things, ideas, or events put together: Chicken soup is a combination of pieces of chicken, vegetables, and water.

7. Cooperate to agree to help toward a common goal: The two workers cooperated with each other to fix the broken pipe.

8. Cooperation act of working with toward a common goal: It takes cooperation between employees to make a business run well.

9. Attract to draw interest: San Francisco attracts millions of tourists each year.

10. Attraction appeal: Because she is afraid of heights, the long trip by airplane had little attraction for her.

11. Admire to like, be pleased by: He admires her good looks.

12. Admiration an attitude of approval or respect : I have great admiration for the way he plays football.

13. Situate to put or build, locate: We situated our house near the beach.

14. Situation way things are at a certain time, the state of what's happening: The child was in a bad situation with no food or water.

15. Examine to look at closely, scrutinize: The mechanic examined the motor for defects.

16. Examination a test of one's knowledge: I took an examination in English yesterday

17. Contribute to give (money, one's time, etc.): She contributes money to her church.

18. Contribution a giving of money, one's time, etc., donation: That rich man makes big contributions to charity.

19. Explore to travel into in order to learn about: The children went to explore the playground.

20. Exploration a journey of discovery, a search: the exploration of space (the moon, the oceans) The exploration team discovered a new sea creature.

21. Challenge Words!

22. Negotiate to talk in order to reach an agreement on prices, wages, conditions, etc. : The labor union is currently negotiating with the company. to talk in order to reach an agreement on prices, wages, conditions, etc. : The labor union is currently negotiating with the company.

23. Negotiation a talk between people to reach an agreement on: The negotiations between the two countries resulted in a new trade agreement. a talk between people to reach an agreement on: The negotiations between the two countries resulted in a new trade agreement.

24. Insulate to put material in walls and roofs to keep buildings warmer: After we insulated the walls and attic, our heating costs went down. to put material in walls and roofs to keep buildings warmer: After we insulated the walls and attic, our heating costs went down.

25. Insulation any material that keeps out cold, heat, and/or sound: My winter jacket has goose feathers as insulation. any material that keeps out cold, heat, and/or sound: My winter jacket has goose feathers as insulation.