One of my deepest held somewhat unpopular opinions on software is that we consistently thing about nouns too much, and when we do think about them we think about the wrong ones.
You'll be far better off spending your time thinking first about the verbs your software needs. Then you can think about nouns, but don't stop at the "thing nouns". Those don't matter nearly so much as the "state nouns".
An Order is important, but a Received Order, a Placed Order, a Fullfilled Order, are far moreso.