Butterball and Heavy-duty

Butterball noun - Small North American diving duck; males have bushy head plumage.

Heavy-duty and butterball are semantically related. In some cases you can use "Heavy-duty" instead an adjective "Butterball".

Heavy-duty adjective - Extreme in degree, power, or effect.

Butterball and heavy-duty are semantically related. Sometimes you can use "Butterball" instead an adjective phrase "Heavy-duty".