Yes, there is a way to make it bigger. With your web browser page showing, up at the top right there is an icon that looks like a paper with lines on it. Tap on that icon, select More Options, select Settings, select Text Size and set to large or huge.
Then turn your nook sideways so the web page goes into landscape mode.
In portrait mode you can also pinch to zoom or double tap the page to make it larger, but you will have to move the page around with your finger to read it all. Landscape mode gives you a better chance of seeing the page edge to edge.