intercourse
1 association, commerce, communication, communion, connection, contact, converse, correspondence, dealings, intercommunication, trade, traffic, truck
2 carnal knowledge, coition, coitus, congress, copulation, intimacy, legover (slang) nookie (slang) rumpy-pumpy (slang) sex (informal) sexual act, sexual intercourse, sexual relations, the other (informal)
sexual intercourse
bonking (informal) carnal knowledge, coition, coitus, commerce (archaic) congress, consummation, copulation, coupling, fucking (taboo) intimacy, legover (slang) mating, nookie (slang) penetration, rumpy-pumpy (slang) screwing (taboo) shagging (taboo) the other (informal) union