As for your a bit sarcastic proposals [did I read that correctly?], I see the following problems: - "queue" implies meaningful ordering and you don't get to skip or totally rearrange a queue without a good reason in most situations that involve a queue - "roadmap" according to Cambridge dictionary is a form of plan, which doesn't quite cut if for describing the can-be-postponed-without-consequences part of the backlog.
Regarding the matter of language: I'm assuming [in this context] the presupposition that words are tools. And you can do a good job with crappy tools and vice versa. Yet there is a correlation between tool quality and the outcome. Example: the WIP limit in kanban - sometimes referred to as "work in progress limit". Why the hell would you like to limit progress? But when you change it to "in process" the whole concept suddenly makes a lot more sense. If everything is in process nothing will ever get done, so putting a limit on that ensures output.