http://www.gtft.org/Library/knoch/library.htm
This is a good resource. The Concordant Version is good that it is almost a concordant by itself. When you see the words are the same in English, they are (mostly) the same in Greek. Vice versa.
And the Comprehensive
Lexicon & Concordance is good that gives all the cognate relations between the original word, which the Strong's doesn't (not exhaustive).
Please remind me if the links are not appropriate.
And please suggest me if there is any resources here helps the understanding of cognate relations.
Thanks.
