Doubles and Two-baser

Doubles noun - Badminton played with two players on each side.

Two-baser is a synonym for doubles. In some cases you can use "Two-baser" instead a noun "Doubles".

Two-baser noun - A base hit on which the batter stops safely at second base.

Doubles is a synonym for two-baser. Sometimes you can replace term "Doubles" with "Two-baser", this terms are similar.