I'm not sure about jumpdrive never heard of it.
Flash drive is generaly used for the cards that go in cammeras and such.
Jumpdrive is a commonly used term for the device, as is flash drive. The thing you put in a camera is a flash CARD, not a flash drive--or maybe a memory card would be a better term.
The whole point of the multiple keywords suggestion is that there is some imprecision in the way terms are used, of which thumb drive, flash drive, pendrive, etc., etc., are good examples.
That's the only major one I can think of.