CH

1. Calico Hills
2. Call Hold
3. Callitrichid Hepatitis
4. Cambridge Heart, Inc. (Bedford, MA)
5. Campbell Hausfeld (Cincinnati, OH)
6. Candle-Hour
7. Capital Height
8. Cardboard Heroes (gaming)
9. Cargo helicopter
10. Cargo Hold
11. Carolina Herrera
12. Carolina Hurricanes (NHL)
13. Carrier/Hum Modulation
14. Carry Handle (firearms)
15. Cascade Head
16. Casualty Handling (St John Smbulance, UK)
17. Center Hall (real estate)
18. Central Heating
19. Centre Hospitalier (French: general hospital)
20. Cerebral Hemisphere
21. CH postcode area
22. Chaff
23. Chain
24. Chain Home
25. Chairman/Chairperson
26. Champion
27. Channel
28. Channel 
29. Chaplain
30. Chapter
31. Charging Handle (firearms)
32. Charity Hospital
33. Charriere Unit (French catheter scale)
34. Chartered Herbalist
35. Chaudhary,
36. Chediak-Higashi Syndrome
37. Chemin (French: Path; Canada Post street designation)
38. Chemistry
39. Chennai (Tamilnadu-India capital)
40. Chester (postcode, United Kingdom)
41. Chief
42. Chieti, Abruzzo (Italian province)
43. Chihuahua (state)
44. Child
45. Children's Hospital
46. Children's Hospital
47. China
48. Chinchilla (rabbit breed)
49. Cholesterol
50. Chomsky hierarchy
51. Chorus
52. Christ's Hospital
53. Christ's Hospital (Bluecoat School, UK)
54. Chronic Hepatitis
55. Church
56. Church History
57. City Hall
58. City Hunter (anime)
59. Ciudad de La Habana (postcode for Havana, Cuba)
60. Clack House (Clay Aiken fan message board)
61. Clarion Health
62. Clay High Plasticity (soil type)
63. Clay of high plasticity (USCS soil type CH)
64. Clearinghouse
65. Clone High (cartoon)
66. Cloud Height
67. Club Herbert
68. Club House (UK maps)
69. Cluster Headache
70. Cluster headache
71. Cochrane Hill
72. Code Holder
73. Coeficiente Honorário (Spanish: conorary coefficient, Brazil)
74. College Humor.com
75. Columbia Helicopters
76. Columbia House (record club)
77. Come Home
78. Coming Home
79. Common Hardware
80. Commonwealth honour
81. Communications House (light rail, Dallas, Texas)
82. Community Health (various organizations)
83. Companion of Honour
84. Compare Halfword (IBM)
85. Compass Heading
86. Complete Heal (Everquest gaming)
87. Component Handling
88. Confoederatio Helvetica (Swiss Confederation; Switzerland)
89. Confoederatio Helvetica (Switzerland, international auto identification)
90. Congenital Hyperthyroidism
91. Congenital hypothyroidism
92. Conquering Hero
93. Conservation Halton
94. Constitution Heterogeneity
95. Contact Handled
96. Contingency Hospital (US DoD)
97. Continuum Hypothesis
98. Control Head
99. Controlled Humidity
100. Correspondent Host
101. Cossacks Heaven (gaming site)
102. Counting Heartbeats (band)
103. Courthouse
104. Covenant House
105. Crack-Head
106. Crazy Hand
107. Creature Handler (Star Wars Galaxies)
108. Credit Hours
109. Critical Habitat
110. Critical Hours
111. Crown Hill (cemetery)
112. Crown-Heel (length of fetus)
113. Cultural Heritage
114. Curry–Howard correspondence
115. Customs House
116. Cutie Honey
117. Cypress Hill