I wasn't sure how to word the title, but it would make training (and explaining things) a lot easier if "Assignments" (as in the tab where you create your gradebook assignments) and "Assignment" (as in a place to upload/turn in assignments) were named differently. The duplicate use of such commonly used and referred to features is confusing when training and working with faculty and students.
Even reading the nicely worded explanation from the What are Assignments for instructors? guide - "Assignments include Quizzes, graded Discussions, and online submissions (i.e. files, images, text, URLs, etc.)" - notice the use of the term "online submissions" instead of "Assignment" in this first sentence in order to avoid confusion?
All of this gets very confusing and could be fixed by calling Assignments (as in the page) "Assignments" and the other something else. Online submissions sounds good, BUT, since this is also the "assignment" type for assignments that don't get uploaded into Canvas, I don't think it would work.