| 1. 劍橋英英字典 four four |
2. 雅虎奇摩字典 four |
3. 韋氏線上字典 four |
4. 朗文英英字典 four |
| 5. Google字典 four |
6. icibt寫作句庫 four |
7. 美國遺產字典 four |
8. wiktionary four |
| 9. Wikipedia four |
10. Howstuffworks four |
11. Urban Dictionary four |
12. EarthSky four |
| 13. answers.com four |
14. WordReference.com four |
15. 英漢詞典 four |
16. yourdictionary.com four |
| 17. Webster Dictionary four |
18. onelook.com four |
19. W3dictionary four |
20. Medlineplus dictionary four |
| 21. Inogolo(名字發音) four |
22. Forvo(發音) four |
23. Quotations(語錄) four語錄 |
24. 韋氏線上學生字典 four |
| 25. 韋氏線上學生詞典 four |
26. 韋氏線上押韻字典 four |
27. Thesaurus.net同義字典 four |
28. Macmillan Dictionary four |
| 29. Macmillan Thesaurus four |
30. getwords.com four |
31. bettermedicine.com four |
32. Collins four |
| 33. Oxford Dictionary four |
34. Oxford ALD four |
35. ozdic.com four |
36. Oxford American four |
| 37. Stanford Encyclopedia of Philosophy four |
38. 圖片搜尋 four |
39. PDF搜尋 four |
40. SWF搜尋 four |
| 41. English-cobuild four |
42. Babylon English four |
43. Babylon Search four |
44. AlphaDictionary four |
| 45. 線上英漢字典 four |
46. Wordnik four |
47. 同義與反義字 four |
48. howjsay . com four |
| 49. Medical Dictionary four |
50. Your Dictionary Sentences four |
51. PronounceHow four |
52. Dictionary Reverso four |
| 53. Memidex(發音) four |
54. dict.cc four |
55. Name Pronunciation four |
56. Vocabulary.com four |
| 57. WebMD four |
58. 海詞 four |
59. 新浪香港 four |
60. Linguee four |
| 61. VoiceTube four |
62. 大詞典 four |
63. sentencedict.com four |
64. definition-of.com four |
| 65. YouTube four |
66. 詞都 four |
67. 押韻詞典 four |
68. RhymeZone four |
| 69. RhymeZone four |
70. 漢語詞典 four |
71. Pronounce Names four |
72. Youglish four |
| 73. 查文法 four |
74. Purdue OWL four |
75. Reference.com four |
76. Ozdic.com 語詞搭配 four |
| 77. OXFORD 語詞搭配 four |
78. YARN movie clips four |
79. Ted.com four |
80. thesaurus.plus four |
| 81. cliffsnotes four |
82. sparknotes four |
83. Describing Words four |
84. Ludwig four |
| 85. study.com four |
86. webmd.com four |
87. word hippo(adj) four |
88. word hippo(noun) four |
| 89. word hippo(verb) four |
90. word hippo(adv) four |
91. word hippo(singular) four |
92. word hippo(pl.) four |