Well, Animaterra, I think we've got opus down right, but this is what I found for progress...take yer pick**BG**..the progressus I used was male, which I assumed was right because opus ended in "us"...BUT it's been too many years for me to remember all of the conjugations and rules, too! Looks as though opus profectum might be more correct. Anyway, here ya go:

proficio -ficere -feci -fectum: of persons [to make progress , advance]; of things, [to be of use, assist, help].

progressio -onis f. [advance , progress; increase]; rhet. [climax].

progressus -us m. [going forwards , advance, progress; increase].