Across:
3. Mycology
6. Hydrology
7. Lithology
8. Pathology
9. Felinology
10. Anthropology
12. Hematology
15. Methodology
17. Apiology
18. Embryology
19. Oology
20. Thermology
Down:
1. Glaciology
2. Oceanology
4. Neurology
5. Entomology
9. Cytology
11. Zoology
13. Hippology
14. Biology
16. Dendrology