Assign a list of words to a graphic?

Hello,

I'm struggling to come up with a solution for the following problem:

I am creating points at random locations using a for loop.

The number of points created is equal to the number of tweets received like this:

 for (int p=0; p<=numberOfTweets; p++) {
    float x=random(width);
    float y=random(height);
    point(x, y);
  }

Instead of a random (fixed) position, the points will eventually be positioned using noise and will have motion.

The part I am having difficulty with is deciding on the best way to:

Create a new point when a tweet is received

Store the tweet as individual words

Compare the words in the tweet to the words of previously received tweets

Draw a line between points that contain the same word(s)

Kill each point after 1 minute

The idea being something like this (without the text being visible):

So if anyone can suggest the best method(s) for storing words and creating graphics in this way then that would be great!

Thanks