Thesaurus talk:copulate
References for (slang) terms edit
I think there must be many references out there for these terms, including some reputable and/or academic references, especially for slang terms, and also archaic terms.
The Odd Index by Stephen J. Spignesi edit
The Odd Index, by Stephen J. Spignesi, reportedly includes many slang terms under the heading Sexual Intercourse, listed at https://flamsterette.wordpress.com/2004/03/28/euphemisms/.