Vocabulary.

2. Something that is low, at the bottom.
5. An extinct fish of the Devonian period, having the front part of the body encased in broad flat bony plates.
6. Written down, printed, drawn.
7. Made or done.
8. Say, speak.
10. The formation of a word from a sound associated with what is named (e.g. cuckoo, sizzle).
13. Believe.
15. (Of language) Open to more than one interpretation; having a double meaning. Unclear or inexact because a choice between alternatives has not been made.
17. Word. Relating to writing, speaking or being a student of a specific field.
18. To drink habitually. [To] drink habitually.
20. Confuse, perplex, fluster.

1. Write.
3. A compound of the steroid type found in Spiny Dogfish sharks, which has antibiotic properties.
4. Pleasure derived by someone from another person's misfortune.
9. Head.
11. Death.
12. A political leader who seeks support by appealing to the desires and prejudices of ordinary people rather than by using rational argument. Rhetorically exploit (an issue) for political purposes in a way calculated to appeal to the desires and prejudices of ordinary people.
14. In disarray or disorder; askew. Not lined up or not arranged correctly. Diagonally. Not directly across from nor adjacent to.
16. Twilight; dusk.
19. Lead / led.