Chief and Key player

Chief noun - The main or greater part of something as distinguished from its subordinate parts.

Key player and chief are semantically related in person in charge topic. In some cases you can use "Key player" instead a noun "Chief".

Nearby Word: chiefly

Chief and key player are semantically related in superior topic. You can use "Chief" instead a noun phrase "Key player", if it concerns topics such as manager, person higher or highest in rank, often an educational one, person who manages an organization.