Following up on Amber's comment on Andrew Beals' answer, I suggest:
feed-line as the general tag, covering any method of getting RF from point A to point B
coaxial-cable as a more specific tag, covering questions about the different types of coax specifically (and not coax vs ladder line), the care and feeding of coax (regular vs direct burial and that sort of question), and things like how to crimp connectors, making a balun out of coax, etc
coaxial-connectors as a separate tag to discuss the relative merits of PL-259 vs N vs BNC, including crimp vs solder and adapters, but specifically excluding connectors that aren't coax.
Except that feed-line is ambiguous as heck. Coax is a very different beastie than parallel (open wire, ladder line) feed line.
Aside from "keep your lines short, and nearby objects can affect performance", the two (three, if you want to throw in random-wire feeds) do not intersect.