This is a game i used to play all the time when i was kid!
You start with a single word, then say the first word that reminds you of that other word you said. And the point of the game is to try to get to the word you started with.
Example:
Worms
worms>worm hole>space>dead space>videogames>mario>italian>spaghetti>worms
*you can try it if you want!

And see if you can give me a really hard word that you think i won't beable to work out.
NOTE**Do not put to much thought into it as you play--that makes it not fun, just go with the flow and see where you end up