会話 means 'conversation' and functions as a suru-verb.
Common collocations:
- 会話する: to converse, to have a conversation
- 日常会話: daily conversation
- 英会話: English conversation (learning)
- 会話力: conversational ability
会話 vs. 話:
- 会話: two-way conversation
- 話: can be one-way (story, talk) or two-way