Keywords: intercourse, sexual intercourse, copulation, sex, copulate, make love
As a Noun
The act of having sex. Formal English = sexual intercourse, copulation.
The physical activity which people and animals do with each other to produce offspring and/or to experience pleasure. English = sex.
As a Verb or Adjective
To have sex. Formal English = have sexual intercourse, copulate. English = make love.