I'll have a go at them, but just a couple general comments first:
- #1 tip for new domainers: don't buy anything until you read. A lot. Inevitably we all just jump in and start buying stuff that we end up dropping, but you want to minimize this as much as possible.
- You can't have an eye for domains until you spend a lot of time learning what makes a good domain, and one that you'll be able to sell.
Ridga - Yes it does appear to be a name, and as a brandable it would likely be viewed as a variation on the word "ridge", making it a possible outdoor brand? I would put it up for a few hundred at a few marketplaces and see what happens. You can re-evaluate when renewal time comes.
nSpend - The "n" at the front likely kills the value, unless there's a common meaning I'm not aware of. Am I able to go out and hand register tSpend, vSpend, bSpend? Are there any sites like this currently developed?
Warpism - "Warp" is not a great keyword, and "ism" is not a popular suffix. Could work as a sci-fi blog or forum, but I don't think anyone starting a site like that is looking to spend much on a domain name. They would need to want the word "warp" and would have to like this name significantly more than something else like Warpzy, Warpevo, Warpera, Warpo, Warply...
VodBud - Maybe... It's short and easy to spell/remember. More research is needed. How many active video sites use "Vod"? Is anyone buying this term in the aftermarket? And then there's the added concern (or maybe it's a plus...) that "bud" is a cannabis slang term.
Throw them all up with low BIN prices at a bunch of marketplaces. See if you get any bites. Don't marry yourself to any of them and be willing to let them drop when renewal time comes (unless you've gathered more promising info on them before then).
Now just do a lot of reading before buying more. NamePros is a great place for that.