What to call it?

[petitepixie]

What should I call a paper I've written when I'm mentioning it in a personal statement? To me, "essay" sounds a bit amateruish, but "paper" seems to imply published. As an undergrad, I didn't write a thesis either. I did a few original research projects (conducted focus groups, coded an analyzed results) and a few background and analysis pieces (comparative case studies, extensive lit reviews, policy proposals), each with a 50-60page end product. What is a quick one-word thing I can call these?