1. American prizefighter who won the world heavyweight championship three times (born in 1942).
4. A federal agency established to regulate the release of new foods and health-related products.
7. An Indian unit of length having different values in different localities.
11. An informal term for a father.
12. The act of slowing down or falling behind.
13. An organization of countries formed in 1961 to agree on a common policy for the sale of petroleum.
14. (informal) Of the highest quality.
15. A compartment in front of a motor vehicle where driver sits.
17. A period marked by distinctive character or reckoned from a fixed point or event.
18. Made of fir or pine.
20. (of complexion) Blemished by imperfections of the skin.
22. A radioactive element of the actinide series.
24. An independent agency of the United States government responsible for collecting and coordinating intelligence and counterintelligence activities abroad in the national interest.
25. African tree having an exceedingly thick trunk and fruit that resembles a gourd and has an edible pulp called monkey bread.
29. A Tibetan or Mongolian priest of Lamaism.
33. An inlaid furniture decoration.
34. A soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal.
35. An Arabic speaking person who lives in Arabia or North Africa.
36. A condition (mostly in boys) characterized by behavioral and learning disorders.
37. Someone who works (or provides workers) during a strike.
45. An accidental happening.
48. A loose sleeveless outer garment made from aba cloth.
49. The compass point that is one point south of due west.
50. A Loloish language.
51. Having leadership guidance.
52. How long something has existed.
53. An official language of the Republic of South Africa.
54. An agency of the United Nations affiliated with the World Bank.

1. (Babylonian) God of storms and wind.
2. A cord that is drawn through eyelets or around hooks in order to draw together two edges (as of a shoe or garment).
3. The content of cognition.
4. A state in southeastern United States between the Atlantic and the Gulf of Mexico.
5. Small European freshwater fish with a slender bluish-green body.
6. Title for a civil or military leader (especially in Turkey).
7. A heavy odorless colorless gas formed during respiration and by the decomposition of organic substances.
8. Affording unobstructed entrance and exit.
9. (used especially of vegetation) Having lost all moisture.
10. Any of a number of fishes of the family Carangidae.
16. The Tibeto-Burman language spoken in the Dali region of Yunnan.
19. 1 species.
21. West Indian tree having racemes of fragrant white flowers and yielding a durable timber and resinous juice.
23. A white metallic element that burns with a brilliant light.
26. A soft yellow malleable ductile (trivalent and univalent) metallic element.
27. A midwestern state in north central United States in the Great Lakes region.
28. Having undesirable or negative qualities.
30. A colorless and odorless inert gas.
31. Informal terms for a mother.
32. The blood group whose red cells carry both the A and B antigens.
38. Open-heart surgery in which the rib cage is opened and a section of a blood vessel is grafted from the aorta to the coronary artery to bypass the blocked section of the coronary artery and improve the blood supply to the heart.
39. A domed or vaulted recess or projection on a building especially the east end of a church.
40. Title for a civil or military leader (especially in Turkey).
41. Any of numerous local fertility and nature deities worshipped by ancient Semitic peoples.
42. Surrealist Spanish painter (1904-1989).
43. In bed.
44. A quantity of no importance.
46. Tastelessness by virtue of being cheap and vulgar.
47. A Turkish unit of weight equal to about 2.75 pounds.