A Bible Dictionary is similar to a regular dictionary and defines different words. But it has more information for each entry. If you have questions about a passage you can look up a word or a subject that you are interested in. (shorter articles) *
Theological Dictionaries: A dictionary of theology is similar to a Bible dictionary in that it provides notes on how a word or subject is used in both the Old and New Testaments. In addition to that information, a theological dictionary also has comments on how the topic has been viewed by the church down through the years. The topics are listed in alphabetical order. *
Bible Handbooks: A Bible Handbook is similar to a Bible dictionary. The main difference is that a Bible dictionary has short articles arranged alphabetically, while a Bible handbook provides a brief running commentary of each of the books of the Bible. It contains maps, historical backgrounds, archaeological background, tables of weights and measures, lists of kings and genealogies and much more information. *
Bible encyclopedias are multi volume sets of articles about people, places, and subjects arranged in alphabetical order. It is similar to a Bible Dictionary but with much more information. They contain historical background information and sometimes there is commentary information also.(longer articles) *
A concordance is an alphabetical index of the words found in one or more versions of the Bible, a text-finder that enables the reader to locate a particular verse by looking up a key word in it *
Nave's Topical Bible | Strong's Exhaustive Concordance | Torrey's New Topical Textbook | Treasury of Scripture Knowledge
Topical Indexes: A topical Bible lists references to ideas and themes, regardless of whether the actual words are mentioned. A topical Bible will give references in the Bible for you to look up regarding the topic, and you can use it with any translation. *