Bulk registration
Check fifty names in one pass.
Paste the list you have been keeping, see which are still free, and add the ones you want to the cart together. Every answer comes from the registry, not from a cache.
Why do it this way
One request, not fifty
The whole list is checked in a single call, so fifty names take about as long as one.
Live registry answers
Availability is what the registry says at that moment. A name shown free is free.
One cart, one checkout
Add what you want as you read down the list and pay for all of it once.
Nothing is reserved by looking
Checking a name does not hold it. If it matters, add it to the cart and check out.
Have a list ready?
Paste it above. If anything comes back unexpectedly taken, WHOIS will tell you who holds it.