I’m used to network knowledge management and adding some networking features would be really useful. Frequently I feel the need to link two or more cards. Case study:
Word 1 - noun
Word 2 - verb
Word 3 - an idiom that involves word 1 or word 2.
So I assume, you would like to see the linked words be asked in the quiz as a group? Or would you only want to use the links for browsing words?