When looking for synonyms to the word "industrial-strength", one can turn to words like robust, durable, heavy-duty, sturdy, and reliable. These terms are often used to describe products that are made to withstand heavy wear and tear in industrial or commercial settings. Other synonyms include solid, tough, unbreakable, hard-wearing, long-lasting, and resilient. These words convey a sense of strength, power, and durability, making them ideal for marketing products that are designed for heavy use. Whether you are looking for a product that can withstand the toughest conditions or simply want to add some emphasis to your descriptions, these synonyms can help you convey the strength and reliability of your products.