Web is what I do most lately. I've designed and developed many Webs, Intranet, Internet, Static Content, Dynamic Content, Full Flash, Web-Based Application, etc. You can browse My Portfolio for List of Projects I've done recently.

Web Design
You need a specific Design for your Web, a unique design which represents your Company, your Program, your Personality and whatever it is your Web contained.

Web Development
Developing Web is Cooking the Web Design into a browsable Format. Static Content Web will deal with many html, and Dynamic Content Web will use Database Server (MySql, PostgreSQL, etc) and Server Side Scripting such as PHP, ASP, JSP, etc.

Web-plication
Web-Based Application.