Kickoff and Openers

Kickoff noun - The point at which something begins.

Openers and kickoff are semantically related In some cases you can replace term "Openers" with "Kickoff", this nouns are similar.

Kickoff and openers are semantically related in beginning topic. Sometimes you can use "Kickoff" instead a noun "Openers", if it concerns topics such as start of an event or action, ceremony marking the beginning of stage, short preliminary event.