We're coming from Ora.pm, which lets you call the _things_ you're tracking in each project:
Let's one-up that with at least that list, plus the ability to custom title them (just two fields "What do you call these items?" and "What do you call multiples of these items?", which e.g. Webflow does for its CMS setup).
The use case I have in mind is a CRM. I set up a space in CU to centralize my contacts, with lists within there for different types (contractors vs referral sources, etc.). I'd love to "Add a new contractor" (rather than "Add a new task") in the former, and "Add a new source" in the latter.