1. The act of coupling; the embrace of the sexes in coition.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• comilation,
• cosulation,
• poupulation,
• corrlation,
• compultion,
• coproation,
• copitulation,
• copration,
• coilation,
• popoulation,
• popalation,
• popualation,
• popuylation,
• popultion,
• ppopulation,
• populatioon,
• sepulation,
• populatioin,
• poplation,
• populition

• copulatory,
• couplet,
• copulate,
• copulative.

The adjective form of the word "copulation" is "copulatory".

The plural of the "copulation" can be the "copulations".

The singular of the "copulation" can be the "copulation".