List 8 & 9

4. an early type of aircraft with two pairs of wings, one above the other.
6. interrupt action or speech briefly.
8. a formal discussion on a particular topic in a public meeting or legislative assembly, in which opposing arguments are put forward.
10. (a mirror or shiny surface) show an image of
12. an instrument for converting sound waves into electrical energy variations which may then be amplified, transmitted, or recorded.
14. a hypothetical or fictional being from outer space.
16. (of a straight line) joining two opposite corners of a square, rectangle, or other straight-sided shape.
17. bring (a fact, event, or situation) back into one's mind; remember.
18. not firmly or tightly fixed in place; detached or able to be detached.
19. to pay back (a loan, debt, or sum of money)

1. of an activity at a school or college pursued in addition to the normal course of study.
2. a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.
3. a very small living thing, especially a bacterium that causes disease.
5. a measure taken in advance to prevent something dangerous, unpleasant, or inconvenient from happening.
7. distort the shape or form of; make misshapen.
8. conversation between two or more people as a feature of a book, play, or movie.
9. cause someone to believe something that is not true, typically in order to gain some personal advantage.
11. withdraw, draw back.
13. preconceived opinion that is not based on reason or actual experience.
15. identify the nature of (an illness or other problem) by examination of the symptoms.