One-shot and Until now

One-shot adjective - Happening only once.

Until now and one-shot are semantically related in earlier topic. In some cases you can use "Until now" instead an adverb phrase "One-shot".

Until now adverb - Used in negative statement to describe a situation that has existed up to this point or up to the present time.

One-shot and until now are semantically related in earlier topic. You can use "One-shot" instead an adverb phrase "Until now".