Thunderhead and Thundercloud

Thunderhead noun - A rounded projecting mass of a cumulus cloud with shining edges; often appears before a thunderstorm.

Thundercloud and thunderhead are semantically related. In some cases you can use "Thundercloud" instead a noun "Thunderhead".

Thundercloud noun - A dark cloud of great vertical extent charged with electricity; associated with thunderstorms.

Thunderhead and thundercloud are semantically related. You can use "Thunderhead" instead a noun "Thundercloud".