From the co-author of the classic Jamieson, Fausset and Brown Commentary, Fausset’s Bible Dictionary stands as one of the best single-volume Bible encyclopedias ever written for general use.
A classic Greek lexicon useful for every theology student. Note that Thayer was a universalist, so be careful with any word dealing with salvation, and also the Trinity (his definition of “Christ” would seem to doubt Jesus’ deity). Basically the majority of his word definitions are from standard usage in the Greek NT and classical literature, so in theologically charged words, be careful.
Illustrated Bible Dictionary or Easton’s Bible Dictionary, is a reference work on topics related to the Christian Bible compiled by Matthew George Easton.