Learn German: Der Angriff war rasant, wenngleich ohne Treffer. - The attack was fast-paced, albeit without a hit.

wenngleich (albeit) is frequently used to attach an elliptical clause, which is a phrase where the subject and verb are dropped because they are obvious from the context. The full thought here is wenngleich er ohne Treffer war (even though it was without a hit). Dropping the verb makes the sentence much more elegant.

Could I use obwohl instead of wenngleich here?

You could say obwohl ohne Treffer, but wenngleich sounds much more natural when you drop the verb. It functions almost exactly like the English word albeit. If you use obwohl, native speakers generally prefer to build out the full clause: obwohl er ohne Treffer war.

Does rasant just mean the same thing as schnell?

It means fast, but carries a stronger nuance of intense momentum, thrill, or rapid development. You will often hear rasant used to describe a fast-paced sports match, a thrilling movie scene, or rapid technological progress. It sounds much more dynamic than a simple schnell.

In what context would you see Angriff and Treffer paired like this?

This specific combination is classic sports commentary. Der Angriff refers to an offensive push or play (the attack), while ein Treffer refers to a goal, a point, or a literal hit in sports like football, handball, or fencing.