Cross-country and Heavy-duty

Cross-country adverb - Across the countryside.

Heavy-duty and cross-country are semantically related. In some cases you can use "Heavy-duty" instead an adjective phrase "Cross-country".

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

Cross-country and heavy-duty are semantically related. You can use "Cross-country" instead an adjective phrase "Heavy-duty".