Eager beaver and Spark plug

Eager beaver noun - An alert and energetic person.

Spark plug and eager beaver are semantically related. in industrious person topic. In some cases you can use "Spark plug" instead a noun phrase "Eager beaver".

Spark plug noun - Electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark.

Eager beaver and spark plug are semantically related. You can use "Eager beaver" instead a noun phrase "Spark plug".