The best replacement for conversation is dialogue.

The best alternatives to conversation are rated as following:
★★★★★  dialogue
★★★  public speaking
★★★  discussion
★★★  conversations
★★★  communication
★★  argument
★★  dialog
★★  confrontation
★★  interview
★★  conversing
★  presentation
★  debate
★  texting
★  preservation
★  converse
★  chat
★  lecture
★  gossip
★  per our conversation
  speech
  interrogation
  talk
  monolog
  jxl
  speaking
  as per
  monologue
  informal conversation
  face to face conversation

Your alternative for conversation is not listed? Suggest!
Speaking about conversation, one probably shouldn't forget about prejudice.

Other search terms related to conversation and their ratings are:
★★★★★ prejudice
★★★★ eye contact
You have in mind a companion for conversation and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of conversation in all years. Click on graph for more.
conversation
dialogue
public speaking