Yes, concordances are great! You can really get the different meanings like reverent fear, over fear and trembling. I like to do concordance studies, taking one word, and seeing how it crops up. Seeing what more I can learn about it from the Hebrew or Greek. Fear is a good one, as is 'judge' which has a couple of distinct meanings. 'Reins' as in "the reins of our heart" was also an eye opener for me.