Relevant nodes display

I'm using Drupal 7.2 core and I'd like to display similar (just by title) node links under every node. I know that there's a lots of modules to do that, but they use some kind of tags or other serious stuff an开发者_如何学Cd I'd like just to compare titles of nodes. If they're somehow similar put the link in the block. But... how? Or maybe I should use some module but what are these tags, how can I set them automatically to all nodes?

Ok. I did it. It wasn't so hard to add taxonomy tags to nodes and make them specified by nodes author. Then I used Relevant Content module which creates a block with nodes relevant content in it by the nodes taxonomy criteria. And it works like a charm!

Thanks to everyone who viewed this question