You can't. Most browsers will start rendering when enough information has been received or when the complete page has been downloaded. Just two words is not enough.
Anyway, you might try flushing. For more information, see the $| section in the perlvar manpage. You might also want to have a look at suffering from buffering, a very interesting and clear article.

But this might not work as you want it to work. To really give one word first, and then the other, in a web-based environment, I'd suggest you to buy a nice book about Perl and learn about server push and/or client pull.

Update: Oh and besides, would you be so kind to put your code in <CODE> tags? It makes your post more readable. See Writeup Formatting Tips
Update: clarified my message a little. Corrected some typo's too.