Crossword.

2. (adj)Having or showing strong feelings of enthusiasm for something or belief in something.
5. (n)Long life; the fact of lasting a long time.
8. (n)The activity of applying scientific knowledge to the design, building and control of machines, roads, bridges, electrical equipment, etc.
10. (v)To develop gradually, especially from a simple to a more complicated form; to develop something in this way.
11. (n)An agreement between enemies or opponents to stop fighting for an agreed period of time; the period of time that this lasts.
12. (n)The solid material that settles at the bottom of a liquid.
14. (adv)Connected with or happening in the mind.

1. (n)A possible effect or result of an action or a decision.
3. (adj)Clear; easily seen.
4. (adj)Showing that you really mean the opposite of what you are saying; expressing.
6. (adj)Unwilling to obey rules or accept normal standards of behaviour, dress, etc.
7. (adj)Enjoying playing tricks and annoying people.
8. (adj)connected with the relation of plants and living creatures to each other and to their environment.
9. (adj)Behaving in a sensible way, like an adult.
13. (v)To agree to give somebody what they ask for, especially formal or legal permission to do something.