This Darby Bible Dictionary has 8400+ entries. Written by Brethren author John Darby, it has the Brethren point of view.
This dictionary Jackson Dictionary of Proper Names has just 23 chapters, one for each letter of the alphabet. In each one, it has all the proper names beginning with that letter, and its meaning.
A Dictionary of Catechisms from Puritan, Reformed, and several other denominations, such as Baptists, Broadus, Gadsby, Owen, etc.
Hitchcock’s Bible Names Dictionary (1869) gives the meaning of names in the Bible from the original languages as well as other information.
Trench’s Classic work, Synonyms of the New Testament, is a study of Greek synonyms in the New Testament, showing their similarities and differences.
Green Greek English Lexicon
This is an old dictionary of Christianity in which a lot of unused (in modern speech) terms are defined. Over 1500 entries.
Hebrew/Greek Synonym Dictionary is a dictionary module showing the Hebrew to English or Greek to English root words.
Wuest Dictionary
Heresies of the Church Thru the Ages